February 13-14, 2026
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Texas Tech-Sports Performance Center - Lubbock, TX
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200m (Banked)
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3,217 ft. elevation
ICON KEY: NCAA DII NJCAA

Men's 400 Meters

Top↑
PL NAME YEAR TEAM TIME TIME
1 Jalen Williams SR-4 Wisconsin 59.47 46.10
2 Detrevyon Goudeau FR-1 Prairie View 37.89 46.20
3 Demarius Smith   Unattached 50.47 46.30
4 Benjamin Nsiah SO-2 New Mexico JC 59.46 46.45
5 William Achee SO-2 Northwestern St. 49.27 46.48
6 Alexavier Monfries SR-4 South Florida 48.46 46.59
7 Kenny Carpenter JR-3 Colorado St. 48.04 46.64
8 Carlton Siwela SO-2 South Plains 34.55 46.68
9 Reuel Campbell SR-4 Lubbock Christian 47.25 46.78
10 Malik Franklin SO-2 Baylor 59.53 46.87
11 Abbas Ali SO-2 Baylor 48.34 46.93
12 Chris Moffett SR-4 Lubbock Christian 57.78 46.97
13 Nathan Metelus SR-4 South Florida 38.06 46.98
14 Kago Seshoka FR-1 Odessa 59.24 47.01
15 Ookeditse Aaron Jerry FR-1 New Mexico JC 56.44 47.03
16 Tyrece Grant JR-3 Texas Wesleyan 47.13 47.13
17 Chris Johnson SR-4 North Texas 52.38 47.19
18 Raheim Scott SO-2 New Mexico JC 43.42 47.19
19 Daniel Sianez SO-2 Lubbock Christian 43.47 47.25
20 Alejandro Arellano JR-3 UT-Rio Grande Valley 1:00.50 47.26
21 Elijah Ferguson FR-1 Texas Tech 37.41 47.35
22 Francis Patanpatan FR-1 Angelo State 40.32 47.43
23 Devontie Archer SR-4 South Florida 53.78 47.59
24 Ashton Whisler JR-3 Colorado St. 1:00.54 47.67
25 William Opare FR-1 Angelo State 52.44 47.67
26 Jamari Harts SR-4 North Texas 55.35 47.71
27 Jahleel Armstrong JR-3 Angelo State 54.53 47.83
28 Bryce McFadden JR-3 Prairie View 50.78 47.90
29 Derrius Henry SR-4 UT-Rio Grande Valley 35.45 47.90
30 Taylor Briggs SO-2 Angelo State 52.38 48.05
31 Desmond Duncan SR-4 Northwestern St. 1:01.99 48.05
32 Aren Spencer SR-4 Baylor 53.48 48.18
33 Nickens Lemba SO-2 Abilene Christian 39.56 48.24
34 Elijah Rowe SR-4 Northwestern St. 55.50 48.26
35 Sebastian Avena SO-2 UTEP 58.43 48.29
36 Caleb Anthony JR-3 Sam Houston 59.43 48.31
37 Zachary DeWalt FR-1 Air Force 43.02 48.33
38 Joshua Sims-Waddy JR-3 Sam Houston 44.08 48.43
39 Braylen Brown SO-2 Texas Lutheran 53.79 48.46
40 Tristan Galvan   Unattached 37.83 48.50
41 Daniel Villegas SO-2 Lubbock Christian 1:03.07 48.51
42 Ty'Shaun Lloyd FR-1 Texas State 41.25 48.53
43 Tyler Honeyman SO-2 Baylor 34.47 48.55
44 Christian Simmons JR-3 Tarleton State 52.51 48.62
45 Makenden Brown JR-3 North Texas 54.47 48.63
46 Kai Keets FR-1 Odessa 1:02.76 48.65
47 Mikkel Johansson SR-4 Northwestern St. 35.06 48.69
48 Ryan McMeen FR-1 Abilene Christian 1:01.85 48.70
49 Jayden McGregor JR-3 Eastern New Mexico 38.98 48.72
50 Tyler Moore SR-4 North Texas 49.70 48.72
51 Felix Levasseur SO-2 South Florida 57.52 48.74
52 Nehemiah Ray SR-4 North Texas 36.60 48.80
53 Dashaun Lezama FR-1 Western Texas College 44.95 48.85
54 Jack Jackson JR-3 Baylor 44.47 48.86
55 Emmett Murphy SR-4 Colorado St. 50.87 48.91
56 Mathew Polk SR-4 UTEP 48.42 48.91
57 Joshua Crum JR-3 South Florida 38.17 48.93
58 Tahj Hamm SR-4 North Texas 51.39 48.94
59 Camden Hawkins FR-1 Tarleton State 58.74 48.95
60 Ryan Hajek JR-3 Air Force 43.62 49.01
61 Zach King JR-3 Air Force 42.17 49.03
62 Kyler Joe JR-3 Eastern New Mexico 58.46 49.12
63 Amari Taylor FR-1 UTEP 50.18 49.19
64 Evan Kipley FR-1 Angelo State 1:00.51 49.19
65 Imanol Marquez FR-1 West Texas A&M 1:03.03 49.24
66 Ryan Gregory JR-3 Long Beach St. 42.90 49.31
67 Adan Santoyo JR-3 Tarleton State 41.98 49.38
68 Jay Castillo SO-2 Western Texas College 53.46 49.50
69 Jaylen Critton SR-4 UT-Rio Grande Valley 58.45 49.53
70 Jaqualand Fields JR-3 Lubbock Christian 1:02.93 49.55
71 A'isayah Brown JR-3 Prairie View 1:03.01 49.61
72 Ethan Moffett JR-3 Texas State 37.23 49.63
73 Ahmir Robinson SO-2 Incarnate Word 1:00.07 49.64
74 Reece Waddell FR-1 Angelo State 44.69 49.65
75 Nevaeh anderson FR-1 Lubbock Christian 51.18 49.69
76 Rudy Gomez FR-1 Lubbock Christian 48.75 49.74
77 Elvin Belepe SO-2 Western Texas College 39.80 49.74
78 Braylon Hoffman   Unattached 1:00.75 49.79
79 Zion Meaders SO-2 UTEP 58.27 49.80
80 Griffith Reel FR-1 Lubbock Christian 1:04.81 49.85
81 Carsen Bruns SR-4 Colorado St. 44.39 49.87
82 Tristan Guerrero JR-3 Angelo State 39.48 49.97
83 Clinton Laguerre JR-3 Northwestern St. 35.06 50.08
84 Jayden Haynes FR-1 UT-Arlington 38.08 50.10
85 Samuel Enriquez FR-1 Incarnate Word 51.14 50.13
86 JaDan Keiler   Unattached 44.63 50.14
87 Caden Keller SO-2 Texas Lutheran 1:02.21 50.17
88 Byron Pruitt JR-3 Eastern New Mexico 56.21 50.18
89 Dane Dugger FR-1 West Texas A&M 1:05.29 50.22
90 Timothy Price Jr. FR-1 Tarleton State 49.35 50.35
91 Maximilian Kremser JR-3 West Texas A&M 48.37 50.38
92 Collin Woodside FR-1 UT-Arlington 37.31 50.41
93 David-Marquis Patrick   Unattached 59.64 50.54
94 Olaoluwa Ogidan FR-1 South Plains 36.41 50.56
95 Gavino Ramirez SO-2 Texas Lutheran 41.48 50.58
96 Cristian Hodges FR-1 Prairie View 43.57 50.66
97 Victor Petrov SR-4 Texas State 58.32 50.71
98 David Hinojosa SO-2 Texas Lutheran 37.07 50.77
99 Devin Payne FR-1 UT-Arlington 56.03 50.93
100 Rickey Franks SR-4 Texas Lutheran 45.93 51.03
101 Kemron Mathlyn FR-1 South Plains 41.37 51.07
102 Jaden Dasher SO-2 Long Beach St. 1:04.63 51.29
103 Kendon Hill SO-2 Prairie View 36.95 51.32
104 Ernest Ayanugo JR-3 UNT-Dallas 1:00.75 51.48
105 Ray Ochoa FR-1 Tarleton State 1:00.52 51.72
106 Elijah Williams SO-2 Incarnate Word 45.17 51.92
107 Beckham Kelly FR-1 Incarnate Word 47.93 52.09
108 Ilan DeLuna FR-1 Incarnate Word 1:07.24 52.12
109 Donal Martin FR-1 UT-Arlington 44.46 52.30
110 Dominic Powell FR-1 Incarnate Word 45.09 52.42
111 JuanDiego Diego Duran SO-2 Eastern New Mexico 53.18 52.65
112 Taye Jackson SR-4 Incarnate Word 41.23 52.85
113 Aidan Turner JR-3 Long Beach St. 48.12 53.46
  Rami Balti SR-4 Angelo State DNS DNS
  Jordan Ferguson   Unattached DQ DQ
  Kason Jones SR-4 Northwestern St. DNF DNF
  Kevin Bliss FR-1 Western Texas College DNS DNS
  Jordan Elie-Stuart FR-1 Air Force DNS DNS
  Milo Orona SR-4 Long Beach St. DQ DQ
  Todd Woods SO-2 Prairie View DNS DNS
  Travis Turner Jr SO-2 Colorado St. DNS DNS
  Tanatswa Mukute JR-3 Tarleton State DNS DNS
  Demar Francis   Unattached DQ DQ
  Ismael Risser FR-1 South Plains DNS DNS
  jayden Palacios SO-2 Western Texas College DNS DNS
  Evan Simmons SR-4 Tarleton State DNS DNS
  Phil Cotton JR-3 North Texas DNS DNS
  Vance Landa JR-3 West Texas A&M DNS DNS
Men's 400 Meters Section 1
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME TIME
1 Jalen Williams SR-4 Wisconsin 39.19 53.02 46.10 42.42 42.88 34.58 36.42
12 Chris Moffett SR-4 Lubbock Christian 36.64 1:01.07 46.97 38.05 58.25 55.90 1:01.07
21 Elijah Ferguson FR-1 Texas Tech 42.62 1:01.09 47.35 54.46 44.51 53.98 49.25
65 Imanol Marquez FR-1 West Texas A&M 51.71 51.21 49.24 34.47 42.35 53.68 56.63
86 JaDan Keiler   Unattached 1:03.18 39.61 50.14 59.67 43.63 46.63 53.65
Men's 400 Meters Section 2
PL NAME YEAR TEAM TIME TIME TIME TIME TIME
8 Carlton Siwela SO-2 South Plains 54.62 46.68 46.68 40.15 47.62
16 Tyrece Grant JR-3 Texas Wesleyan 48.08 33.00 47.13 38.65 51.38
41 Daniel Villegas SO-2 Lubbock Christian 42.69 38.33 48.51 43.66 47.54
62 Kyler Joe JR-3 Eastern New Mexico 52.07 51.58 49.12 46.67 1:00.42
91 Maximilian Kremser JR-3 West Texas A&M 58.95 44.84 50.38 58.44 59.96
Men's 400 Meters Section 3
PL NAME YEAR TEAM TIME TIME TIME TIME TIME
4 Benjamin Nsiah SO-2 New Mexico JC 58.53 50.17 46.45 50.63 59.46
45 Makenden Brown JR-3 North Texas 34.53 50.09 48.63 34.53 39.88
79 Zion Meaders SO-2 UTEP 1:02.75 38.85 49.80 48.81 59.27
99 Devin Payne FR-1 UT-Arlington 54.50 36.67 50.93 49.92 48.90
  Rami Balti SR-4 Angelo State DNS DNS DNS DNS DNS
Men's 400 Meters Section 4
PL NAME YEAR TEAM TIME
5 William Achee SO-2 Northwestern St. 46.48
10 Malik Franklin SO-2 Baylor 46.87
22 Francis Patanpatan FR-1 Angelo State 47.43
67 Adan Santoyo JR-3 Tarleton State 49.38
104 Ernest Ayanugo JR-3 UNT-Dallas 51.48
Men's 400 Meters Section 5
PL NAME YEAR TEAM TIME
7 Kenny Carpenter JR-3 Colorado St. 46.64
46 Kai Keets FR-1 Odessa 48.65
105 Ray Ochoa FR-1 Tarleton State 51.72
  Jordan Ferguson   Unattached DQ
  Kason Jones SR-4 Northwestern St. DNF
Men's 400 Meters Section 6
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME TIME
18 Raheim Scott SO-2 New Mexico JC 47.67 47.19 40.59 58.99 40.59 58.99 44.83
66 Ryan Gregory JR-3 Long Beach St. 1:00.66 49.31 55.23 39.95 55.72 1:04.11 35.51
111 JuanDiego Diego Duran SO-2 Eastern New Mexico 52.13 52.65 57.39 58.97 54.76 51.07 44.23
  Kevin Bliss FR-1 Western Texas College DNS DNS DNS DNS DNS DNS DNS
  Jordan Elie-Stuart FR-1 Air Force DNS DNS DNS DNS DNS DNS DNS
Men's 400 Meters Section 7
PL NAME YEAR TEAM TIME TIME TIME
6 Alexavier Monfries SR-4 South Florida 36.81 46.59 38.67
17 Chris Johnson SR-4 North Texas 46.25 47.19 44.83
54 Jack Jackson JR-3 Baylor 56.68 48.86 38.60
  Milo Orona SR-4 Long Beach St. DQ DQ DQ
  Todd Woods SO-2 Prairie View DNS DNS DNS
Men's 400 Meters Section 8
PL NAME YEAR TEAM TIME TIME TIME TIME
19 Daniel Sianez SO-2 Lubbock Christian 41.11 49.62 59.07 47.25
35 Sebastian Avena SO-2 UTEP 35.26 36.22 58.92 48.29
44 Christian Simmons JR-3 Tarleton State 40.84 44.73 1:01.27 48.62
57 Joshua Crum JR-3 South Florida 38.66 57.25 35.72 48.93
69 Jaylen Critton SR-4 UT-Rio Grande Valley 50.03 38.14 1:02.41 49.53
Men's 400 Meters Section 9
PL NAME YEAR TEAM TIME TIME TIME
3 Demarius Smith   Unattached 46.30 56.49 54.17
42 Ty'Shaun Lloyd FR-1 Texas State 48.53 43.20 52.42
93 David-Marquis Patrick   Unattached 50.54 55.60 1:05.71
103 Kendon Hill SO-2 Prairie View 51.32 50.81 49.78
  Travis Turner Jr SO-2 Colorado St. DNS DNS DNS
Men's 400 Meters Section 10
PL NAME YEAR TEAM TIME TIME TIME
11 Abbas Ali SO-2 Baylor 59.14 51.63 46.93
14 Kago Seshoka FR-1 Odessa 57.83 36.20 47.01
15 Ookeditse Aaron Jerry FR-1 New Mexico JC 54.09 43.27 47.03
85 Samuel Enriquez FR-1 Incarnate Word 38.10 57.65 50.13
113 Aidan Turner JR-3 Long Beach St. 54.53 42.77 53.46
Men's 400 Meters Section 11
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME
13 Nathan Metelus SR-4 South Florida 54.50 53.09 46.98 44.63 42.76 47.92
26 Jamari Harts SR-4 North Texas 41.51 47.24 47.71 41.99 59.16 33.40
74 Reece Waddell FR-1 Angelo State 43.20 43.70 49.65 49.16 37.24 58.09
83 Clinton Laguerre JR-3 Northwestern St. 37.06 38.57 50.08 1:03.61 36.56 35.56
Men's 400 Meters Section 12
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME TIME
43 Tyler Honeyman SO-2 Baylor 52.44 1:03.12 46.13 48.55 39.33 48.55 55.35
68 Jay Castillo SO-2 Western Texas College 53.46 35.64 1:03.86 43.07 45.05 49.50 38.61
89 Dane Dugger FR-1 West Texas A&M 1:04.79 55.75 49.22 59.26 1:05.29 50.22 58.26
  Tanatswa Mukute JR-3 Tarleton State DNS DNS DNS DNS DNS DNS DNS
Men's 400 Meters Section 13
PL NAME YEAR TEAM TIME TIME TIME TIME TIME
23 Devontie Archer SR-4 South Florida 42.36 43.79 43.79 47.59 39.98
27 Jahleel Armstrong JR-3 Angelo State 36.83 42.09 36.83 47.83 39.22
40 Tristan Galvan   Unattached 1:01.11 1:01.11 43.65 48.50 38.80
61 Zach King JR-3 Air Force 57.37 37.76 45.11 49.03 1:03.74
76 Rudy Gomez FR-1 Lubbock Christian 49.74 39.80 1:04.67 49.74 53.72
Men's 400 Meters Section 14
PL NAME YEAR TEAM TIME TIME TIME TIME TIME
9 Reuel Campbell SR-4 Lubbock Christian 54.27 40.23 46.78 57.54 50.06
48 Ryan McMeen FR-1 Abilene Christian 57.47 1:01.37 48.70 36.04 48.22
60 Ryan Hajek JR-3 Air Force 49.01 55.88 49.01 36.76 48.52
77 Elvin Belepe SO-2 Western Texas College 37.31 50.74 49.74 54.72 50.74
98 David Hinojosa SO-2 Texas Lutheran 1:00.93 39.10 50.77 36.05 43.16
Men's 400 Meters Section 15
PL NAME YEAR TEAM TIME TIME TIME TIME
20 Alejandro Arellano JR-3 UT-Rio Grande Valley 39.70 48.21 49.15 47.26
24 Ashton Whisler JR-3 Colorado St. 51.49 45.77 54.35 47.67
72 Ethan Moffett JR-3 Texas State 59.56 1:01.05 1:02.54 49.63
88 Byron Pruitt JR-3 Eastern New Mexico 53.19 1:01.22 52.69 50.18
90 Timothy Price Jr. FR-1 Tarleton State 1:00.93 41.29 43.81 50.35
Men's 400 Meters Section 16
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME
31 Desmond Duncan SR-4 Northwestern St. 55.26 48.05 36.52 44.69 43.73 53.82
64 Evan Kipley FR-1 Angelo State 1:03.46 49.19 58.05 45.26 37.39 43.29
71 A'isayah Brown JR-3 Prairie View 57.55 49.61 55.07 37.21 43.16 50.11
73 Ahmir Robinson SO-2 Incarnate Word 1:04.54 49.64 37.23 46.67 1:00.56 43.69
  Demar Francis   Unattached DQ DQ DQ DQ DQ DQ
Men's 400 Meters Section 17
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME
25 William Opare FR-1 Angelo State 53.39 58.16 59.11 55.78 47.67 47.67
38 Joshua Sims-Waddy JR-3 Sam Houston 56.67 47.95 39.72 46.01 48.43 43.59
92 Collin Woodside FR-1 UT-Arlington 47.39 46.38 41.84 56.97 50.41 54.45
101 Kemron Mathlyn FR-1 South Plains 53.63 54.65 50.56 1:00.78 51.07 58.73
102 Jaden Dasher SO-2 Long Beach St. 51.81 1:02.06 38.98 39.50 51.29 1:00.53
Men's 400 Meters Section 18
PL NAME YEAR TEAM TIME TIME TIME TIME TIME
29 Derrius Henry SR-4 UT-Rio Grande Valley 41.68 39.76 42.16 47.90 57.01
32 Aren Spencer SR-4 Baylor 1:01.67 39.03 36.14 48.18 36.14
87 Caden Keller SO-2 Texas Lutheran 58.20 46.16 41.14 50.17 54.69
110 Dominic Powell FR-1 Incarnate Word 36.70 39.32 1:00.29 52.42 41.42
  Ismael Risser FR-1 South Plains DNS DNS DNS DNS DNS
Men's 400 Meters Section 19
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME TIME
53 Dashaun Lezama FR-1 Western Texas College 52.76 58.14 48.85 36.15 35.18 42.99 54.23
56 Mathew Polk SR-4 UTEP 1:01.63 47.45 48.91 1:02.61 37.66 36.20 38.64
97 Victor Petrov SR-4 Texas State 37.53 54.26 50.71 43.61 35.50 41.08 45.14
109 Donal Martin FR-1 UT-Arlington 1:03.29 1:05.90 52.30 37.14 57.01 42.89 1:06.95
  jayden Palacios SO-2 Western Texas College DNS DNS DNS DNS DNS DNS DNS
Men's 400 Meters Section 20
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME TIME
39 Braylen Brown SO-2 Texas Lutheran 36.35 57.19 48.46 38.77 40.23 39.26 36.83
47 Mikkel Johansson SR-4 Northwestern St. 37.01 47.23 48.69 57.46 44.80 37.98 38.96
51 Felix Levasseur SO-2 South Florida 50.21 50.21 48.74 47.28 58.98 57.03 36.56
107 Beckham Kelly FR-1 Incarnate Word 1:04.60 45.84 52.09 53.14 41.16 52.09 1:00.43
  Evan Simmons SR-4 Tarleton State DNS DNS DNS DNS DNS DNS DNS
Men's 400 Meters Section 21
PL NAME YEAR TEAM TIME TIME TIME TIME TIME
75 Nevaeh anderson FR-1 Lubbock Christian 38.27 1:03.11 54.17 49.69 51.18
81 Carsen Bruns SR-4 Colorado St. 40.40 46.88 1:03.84 49.87 47.88
82 Tristan Guerrero JR-3 Angelo State 35.98 54.97 42.98 49.97 49.47
106 Elijah Williams SO-2 Incarnate Word 47.77 56.60 42.06 51.92 39.46
112 Taye Jackson SR-4 Incarnate Word 51.80 52.33 53.38 52.85 40.70
Men's 400 Meters Section 22
PL NAME YEAR TEAM TIME TIME TIME TIME
2 Detrevyon Goudeau FR-1 Prairie View 50.36 46.20 55.91 46.67
30 Taylor Briggs SO-2 Angelo State 35.56 48.05 49.50 33.64
34 Elijah Rowe SR-4 Northwestern St. 38.61 48.26 37.65 48.26
70 Jaqualand Fields JR-3 Lubbock Christian 59.46 49.55 59.46 1:01.94
108 Ilan DeLuna FR-1 Incarnate Word 1:00.98 52.12 36.49 1:04.63
Men's 400 Meters Section 23
PL NAME YEAR TEAM TIME TIME TIME
28 Bryce McFadden JR-3 Prairie View 55.57 47.90 47.90
33 Nickens Lemba SO-2 Abilene Christian 59.34 49.69 48.24
36 Caleb Anthony JR-3 Sam Houston 50.25 57.98 48.31
80 Griffith Reel FR-1 Lubbock Christian 58.83 37.89 49.85
94 Olaoluwa Ogidan FR-1 South Plains 1:02.19 1:00.17 50.56
Men's 400 Meters Section 24
PL NAME YEAR TEAM TIME TIME TIME TIME TIME TIME TIME
55 Emmett Murphy SR-4 Colorado St. 51.85 1:00.65 35.71 48.91 1:03.10 41.58 42.56
59 Camden Hawkins FR-1 Tarleton State 35.74 50.91 54.83 48.95 35.74 59.23 51.89
84 Jayden Haynes FR-1 UT-Arlington 57.62 48.60 52.11 50.10 51.61 35.58 57.12
95 Gavino Ramirez SO-2 Texas Lutheran 49.07 59.69 47.04 50.58 38.44 48.05 58.68
  Phil Cotton JR-3 North Texas DNS DNS DNS DNS DNS DNS DNS
Men's 400 Meters Section 25
PL NAME YEAR TEAM TIME TIME TIME TIME TIME
37 Zachary DeWalt FR-1 Air Force 47.37 37.22 41.57 48.33 58.97
49 Jayden McGregor JR-3 Eastern New Mexico 43.36 51.65 52.62 48.72 41.42
52 Nehemiah Ray SR-4 North Texas 37.58 46.36 58.56 48.80 1:02.47
63 Amari Taylor FR-1 UTEP 1:01.49 58.54 1:03.95 49.19 48.70
100 Rickey Franks SR-4 Texas Lutheran 53.08 1:05.32 1:01.75 51.03 43.89
Men's 400 Meters Section 26
PL NAME YEAR TEAM TIME TIME TIME
50 Tyler Moore SR-4 North Texas 48.72 46.78 56.52
58 Tahj Hamm SR-4 North Texas 48.94 1:01.18 42.58
78 Braylon Hoffman   Unattached 49.79 1:01.25 1:01.25
96 Cristian Hodges FR-1 Prairie View 50.66 1:00.29 1:00.80
  Vance Landa JR-3 West Texas A&M DNS DNS DNS