| 2015-04-11 | UFC Fight Night: Gonzaga vs. Cro Cop 2 | Welterweight | Leon Edwards def. Seth Baczynski | KO (punches) | 1 | 0:08 |
| 2014-08-16 | UFC Fight Night: Bader vs. Saint Preux | Welterweight | Alan Jouban def. Seth Baczynski | KO (punch) | 1 | 4:23 |
| 2014-04-19 | UFC on Fox: Werdum vs. Browne | Welterweight | Thiago Alves def. Seth Baczynski | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2013-11-06 | UFC: Fight for the Troops 3 | Welterweight | Seth Baczynski def. Neil Magny | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2013-07-06 | UFC 162: Silva vs. Weidman | Welterweight | Brian Melancon def. Seth Baczynski | KO (punches) | 1 | 4:59 |
| 2012-12-15 | UFC on FX: Sotiropoulos vs. Pearson | Welterweight | Mike Pierce def. Seth Baczynski | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2012-09-22 | UFC 152: Jones vs. Belfort | Welterweight | Seth Baczynski def. Simeon Thoresen | KO (punch) | 1 | 4:10 |
| 2012-06-08 | UFC on FX: Johnson vs. McCall 2 | Welterweight | Seth Baczynski def. Lance Benoist | Decision (split) (27–30, 29–28, 29–28) | 3 | 5:00 |
| 2011-11-19 | UFC 139: Shogun vs. Henderson | Welterweight | Seth Baczynski def. Matt Brown | Submission (guillotine choke) | 2 | 0:42 |
| 2011-09-17 | UFC Fight Night: Shields vs. Ellenberger | Welterweight | Seth Baczynski def. Clay Harvison | Submission (rear-naked choke) | 2 | 1:12 |
| 2010-06-19 | The Ultimate Fighter: Team Liddell vs. Team Ortiz Finale | Middleweight | Brad Tavares def. Seth Baczynski | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |