Bart K. Palaszewski (Polish pronunciation: [palaˈʂɛfskʲi]; born May 30, 1983) is a retired Polish-American professional mixed martial artist who most recently competed in the UFC's Featherweight division.

A professional competitor from 2002 until 2014, Palaszewski has also formerly competed for the WEC, the Quad Cities Silverbacks of the IFL, and King of the Cage.

Palaszewski was born in Warsaw, Poland and lived there until he was 13 years old when he and his family immigrated to Wonder Lake, Illinois.

In Poland, he was a "punching bag" for his older cousin who was involved in kickboxing, and Palaszewski also began judo when he was in the third grade.

[11] Palaszewski returned to face Tyson Griffin in a featherweight bout on October 29, 2011, at UFC 137.

[12] Palaszewski won via first-round KO after dropping Griffin with a left hook and finishing the fight with a flurry of punches against the cage, earning Knockout of the Night honors.

Palaszewski faced Diego Nunes on October 5, 2012, at UFC on FX 5.,[14] losing via unanimous decision (30-27, 29-28, 30-27).