Welterweight · Men

John O'Brien

“The Showstopper”
United States Modern Self-Defense Center debut 2012
Elo 1,223 peak 1,274 · 12 Oct 2024 51 below it
Tapology Sherdog id 4538737
5-5pro record
1L current streak
1,316best win, Elo
1,077average opponent
-- born 3 Feb 1999
71.0" / -- height / reach

Elo history

Hover for the fight at that point; dots are wins and losses

Record

-- – --
Rating by method KO1,112 Sub1,034 Dec1,055

Best wins

By the opponent's Elo on the night
  1. Daniel Jefferson Decision R3 · 14 Aug 2020 · Fighting Alliance Championship 1,316
  2. Ethan Soderstrom Decision R3 · 12 Oct 2024 · Fighting Alliance Championship 1,205
  3. Cory Heinz KO/TKO R1 · 7 Dec 2019 · KC Fighting Alliance 1,023
  4. Johnny Pantoja KO/TKO R1 · 5 Mar 2021 · Fighting Alliance Championship 987
  5. Wayne Collier Submission R1 · 7 Feb 2020 · Ultimate Blue Corner Battles 917

Losses

Newest first
  1. Justin Montalvo Submission R1 · 26 Jul 2025 · Fighting Alliance Championship 1,426
  2. Caleb Crump Decision R3 · 11 Dec 2020 · Fighting Alliance Championship 1,292
  3. Brandon Polcare Submission R1 · 3 Jan 2015 · Reality Fighting 1,190
  4. Derek Hyatt KO/TKO R1 · 5 Apr 2014 · Fight Lab 931
  5. Johnny Lopez Submission R1 · 4 Jan 2014 · Reality Fighting 940

Fight history

26 bouts, newest first; amateur bouts are shaded. Hover a heading for what it means.
# Date Result Opponent Weight class Method Round Score Elo ± Opp Elo Odds Event
26 26 Jul 202526.5 yrs L5-5 Justin Montalvo 7-3 · 29.3 yrs Welterweight SubGuillotine Choke R13:28 0.00 1,274→1,223 -51 1,426 – Fighting Alliance Championship 30: O'Brien vs. Montalvo Fighting Alliance Championship
25 12 Oct 202425.7 yrs W5-4 Ethan Soderstrom debut · 28.6 yrs Welterweight DecisionUnanimous R315:00 0.84 1,218→1,274 +56 1,205 – Fighting Alliance Championship 26: Fight 4 the Cure Fighting Alliance Championship
24 5 Mar 202122.1 yrs W4-4 Johnny Pantoja 1-2 · 26.8 yrs Welterweight KO/TKOGround & Pound R12:20 1.00 1,213→1,250 +38 987 – Fighting Alliance Championship 7 Fighting Alliance Championship
23 11 Dec 202021.9 yrs L3-4 Caleb Crump 3-1 · 28.4 yrs Lightweight DecisionUnanimous R315:00 0.16 1,266→1,213 -53 1,292 – Fighting Alliance Championship 5 Fighting Alliance Championship
22 14 Aug 202021.5 yrs W3-3 Daniel Jefferson 2-1 · 29.9 yrs Lightweight DecisionMajority R315:00 0.62 1,221→1,266 +45 1,316 – Fighting Alliance Championship 3 Fighting Alliance Championship
21 7 Feb 202021.0 yrs W2-3 Wayne Collier 0-4 · 28.5 yrs Welterweight SubRear Naked Choke R10:39 1.00 1,191→1,221 +30 917 – Blue Corner Promotions - Ultimate Blue Corner Battles Ultimate Blue Corner Battles
20 7 Dec 201920.8 yrs W1-3 Cory Heinz 1-1 Welterweight KO/TKOPunches R11:10 1.00 1,129→1,191 +61 1,023 – Cageside Promotions / KCFA - Kansas City Fighting Alliance 36 KC Fighting Alliance
19 22 Jun 201920.4 yrs W5-11 Joey Hart 6-2-1 · 22.0 yrs Welterweight DecisionUnanimous R39:00 0.84 1,050→1,129 +80 1,255 – Cageside Promotions - Gail's Harley-Davidson Fight Night Fight Circus am
18 4 May 201920.2 yrs W4-11 Lance Templeton 5-1 · 27.0 yrs Lightweight SubTriangle Choke R11:01 1.00 946→1,050 +104 1,177 – Cageside Promotions / KCFA - Kansas City Fighting Alliance 33 KC Fighting Alliance am
17 22 Sep 201819.6 yrs L3-11 Luis Felipe 6-3 · 26.3 yrs Lightweight DecisionSplit R39:00 0.44 912→946 +34 1,172 – Cageside Promotions / KCFA - Kansas City Fighting Alliance 30 KC Fighting Alliance am
16 28 Jul 201819.5 yrs W3-10 Demetrius Heath 0-4 Welterweight SubRear Naked Choke R12:42 1.00 841→912 +71 871 – Cageside Promotions / KCFA - Kansas City Fighting Alliance 29 KC Fighting Alliance am
15 5 May 201819.2 yrs W2-10 Tyler Berg 2-0 · 22.4 yrs Catchweight DecisionUnanimous R39:00 0.84 745→841 +97 1,116 – Cageside Promotions / KCFA - Kansas City Fighting Alliance 28 KC Fighting Alliance am
14 30 Sep 201718.7 yrs W1-10 Christian Lacey debut Welterweight SubRear Naked Choke R11:01 1.00 621→745 +124 1,102 – Cageside Promotions / KCFA - Kansas City Fighting Alliance 25 KC Fighting Alliance am
13 29 Jul 201718.5 yrs L0-10 Trey Glass 0-1 Welterweight KO/TKOPunches R38:40 0.00 637→621 -16 982 – Cageside Promotions / KCFA - Kansas City Fighting Alliance 24 KC Fighting Alliance am
12 3 Jan 201515.9 yrs L0-3 Brandon Polcare debut Featherweight SubArm-Triangle Choke R10:47 0.00 612→606 -6 1,190 – Reality Fighting - Mohegan Sun Reality Fighting
11 5 Apr 201415.2 yrs L0-2 Derek Hyatt debut · 31.0 yrs Featherweight KO/TKOPunches R12:23 0.00 640→612 -28 931 – FLP - Fight Lab 36: Misery Loves Company 7 Fight Lab
10 4 Jan 201414.9 yrs L0-1 Johnny Lopez 1-3 · 30.7 yrs Featherweight SubGuillotine Choke R11:09 0.00 670→640 -31 940 – Reality Fighting: New Year's Bash 2 Reality Fighting
9 16 Nov 201314.8 yrs L0-9 Mickey Witham debut Featherweight KO/TKO R24:25 0.00 691→670 -20 987 – XCP: Barre Beatdown 4 Xtreme Combat Promotions am
8 24 Aug 201314.6 yrs L0-8 Chris Lynde 1-9 Featherweight KO/TKO R12:39 0.00 758→691 -68 748 – XCP: Bennington Fight & Fitness Expo Xtreme Combat Promotions am
7 8 Jun 201314.3 yrs L0-7 Randy Sisenstein debut · 22.0 yrs Bantamweight KO/TKOKO/TKO R12:12 0.00 783→758 -25 1,033 – USA MMA Challenger Series 1 Art of Combat Sports Championships am
6 26 Apr 201314.2 yrs L0-6 Andrew Canale 1-0 Bantamweight SubSubmission R1 0.00 802→783 -19 1,111 – Art of Combat SC 4 Art of Combat Sports Championships am
5 9 Mar 201314.1 yrs L0-5 John Ward debut · 20.0 yrs Bantamweight KO/TKOPunches R11:33 0.00 835→802 -33 1,026 – XCP: Randolph Rampage Xtreme Combat Promotions am
4 25 Jan 201314.0 yrs L0-4 Scott Grantham 2-0 · 32.7 yrs Bantamweight SubArmbar R11:02 0.00 857→835 -22 1,140 – Art of Combat SC 3 Art of Combat Sports Championships am
3 15 Dec 201213.9 yrs L0-3 Jeremy Yerdon debut Bantamweight KO/TKOPunches R23:42 0.00 902→857 -45 1,016 – XCP: War In Whitehall 1 Xtreme Combat Promotions am
2 24 Nov 201213.8 yrs L0-2 Michael Smith debut Bantamweight SubArmbar R10:35 0.00 954→902 -53 1,023 – XCP - Anarchy 2: Season's Beatings Xtreme Combat Promotions am
1 13 Oct 201213.7 yrs L0-1 Andre Belcarris 2-2 · 27.2 yrs Bantamweight KO/TKOPunches R10:36 0.00 1,019→954 -64 1,026 – XCP Rutland 1: Rumble in Rutland Xtreme Combat Promotions am