|Weight Class||Middleweight / Welterweight|
|Height||6' 3" (191 cm)|
|Birth Date||November 26, 1981|
|Fighting Out Of||Apache Junction, Arizona, USA|
Baczynski was a cast member on The Ultimate Fighter 11: Team Liddell vs. Team Ortiz, although he was defeated in his elimination round fight when he dropped a unanimous decision to Court McGee, an injury to Chris Camozzi allowed him to enter the house where he won his first round bout against Joseph Henle before being disqualified in the second round Brad Tavares due to an illegal soccer kick.
|Record||18 - 9 - 0 (Win – Loss – Draw)|
|Loss||Mike Pierce||Decision (Unanimous)||UFC on FX 6: Sotiropoulos vs. Pearson||12/14/2012||3||5:00|
|Win||Simeon Thoresen||KO (Punch)||UFC 152: Jones vs. Belfort||9/22/2012||1||4:10|
|Win||Lance Benoist||Decision (Split)||UFC on FX 3: Johnson vs. McCall 2||6/8/2012||3||5:00|
|Win||Matt Brown||Submission (Guillotine Choke)||UFC 139: Shogun vs. Henderson||11/19/2011||2||0:42|
|Win||Clay Harvison||Submission (Rear Naked Choke)||UFC Fight Night 25: Battle on the Bayou||9/17/2011||2||1:12|
|Win||Alex Garcia||TKO (Punches)||Ringside MMA 10: Cote vs. Starnes||4/09/2011||2||2:44||Won Ringside MMA Interim Welterweight Championship|
|Win||Tim McKenzie||KO (Punches and Elbows)||TPF 7: Deck the Halls||12/02/2010||1||2:15|
|Loss||Brad Tavares||Decision (Unanimous)||The Ultimate Fighter 11 Finale||6/19/2010||3||5:00|
|Win||Tom Nguyen||Submission (Guillotine Choke)||WBFN: Wild Bill's Fight Night 23||10/30/2009||2||1:32|
|Loss||Roger Bowling||KO (Punches)||MMA BigShow: Retribution||3/07/2009||1||0:09||For MMA Big Show Welterweight Championship|
|Win||James Warfield||KO (Flying Knee and Punches)||EVO MMA: Evolution MMA||10/04/2008||1||1:21|
|Win||Oscar Montano||Submission (Triangle Choke)||MFC: Mexican Fighting Championship||9/20/2008||1||1:30|
|Win||Antonio Grant||KO||SCF: Silver Crown Fights||8/08/2008||1||0:11|
|Loss||Donnie Liles||Submission (Anaconda Choke)||WC 4: Warriors Collide 4||7/19/2008||1||2:01|
|Win||Eddie Arizmendi||Submission (Triangle Choke)||RITC 111: Rage in the Cage 111||6/07/2008||2||2:03|
|Win||Jordan Pergola||Submission (Triangle Choke)||XFC 3: Rage in the Cage||3/02/2008||1||N/A|
|Win||Kito Andrews||Submission (Triangle Choke)||FMF: Full Moon Fighting||2/23/2008||3||3:50|
|Win||Chris Kennedy||TKO (Punches)||Tuff-N-Uff: Thompson vs. Troyer||2/01/2008||1||2:50|
|Loss||Dan Molina||Submission (Heel Hook)||IFL: Las Vegas||6/16/2007||1||1:32|
|Loss||Brent Beauparlant||Decision (Unanimous)||IFL: Connecticut||4/13/2007||3||4:00|
|Win||Seth Ballantine||Submission (Armbar)||RITC 89: Triple Main Event||12/02/2006||2||1:18|
|Win||Travos Degrout||Submission (Choke)||RITC 84: Celebrity Threatre||7/01/2006||1||N/A|
|Win||Jonathan Tsosie||Submission (Choke)||RITC 80: Fight Night at the Fort||3/18/2006||1||1:32|
|Loss||Shane Johnson||Submission (Kneebar)||RITC 79: The Rage Returns||2/24/2006||1||2:29|
|Loss||Gabriel Flores||Submission (Choke)||RITC 76: Hello Tucson||11/11/2005||3||1:56|
|Win||Robert King||TKO (Retirement)||RITC 76: Friday Night Fights||9/30/2005||1||0:35|
|Loss||Ryan Potter||Submission (Choke)||RITC 73: Arizona vs. Nevada||8/6/2005||1||1:18|
Mixed Martial Arts Career
Seth began fighting in 2006, making his debut at a Rage in the Cage event. Seth lost the fight to Shane Johnson via Kneebar submission in round one. Seth bounced back from the loss and won three straight fights, all for Rage in the Cage.
He then signed a contract with the International Fight League (IFL). He debuted for the promotion against Brent Beauparlant, losing via decision. He was given a second chance, and fought Dan Molina. The fight ended with Seth, again, on the losing end. Seth was released from the IFL after the loss.
Seth obtained a 7-1 record after being released from the IFL. He then fought up and comer Roger Bowling, losing by vicious knockout only nine seconds into round one. Seth won a fight against Tom Nguyen at a Wild Bill's Fight Night event. He was then selected to be a part of The Ultimate Fighter.
The Ultimate Fighter
Seth was selected as one of the 28 competitors for The Ultimate Fighter 11. To get onto the show and become one of the 14 fighters, Seth had to fight Court McGee. After three rounds, the judges awarded the win to McGee, sending Seth home.
After a fighter was injured and forced out of the competition, Seth was given the injured fighter's spot. In his first fight back he fought Team Liddell's last pick, Joseph Henle. Seth won the fight via three round unanimous decision and moved onto the quarter-final round.
In the quarter-final round, Baczynski faced rival team member and friend Brad Tavares. As the first round ended, Baczynski threw an illegal soccer kick to the head of Tavares. Baczynski immediately apologised, knowing he could have seriously hurt Tavares, who went to his corner and slumped. After discussing the matter with the doctors, Herb Dean stopped the fight and Tavares was declared the winner by disqualification, advancing him to the semi-finals.
Ultimate Fighting Championships
Seth made his UFC debut in a rematch against Brad Tavares on June 19, 2010 at The Ultimate Fighter 11 Finale. The anticipated and action-packed rematch didn't disappoint, and the fighters kept a frantic pace while both standing and scrambling on the mat. Tavares' takedowns and dominant ground positions, including prolonged stretches in which he worked for a rear-naked choke, allowed him to outpoint Baczynski, who nearly ended the bout with a Triangle Choke midway through the final round. The near-submission allowed Baczynski to win the final frame, but Tavares took the first two to earn the unanimous-decision win via 29-28 scores on all three judges' cards.