KSW 31 Materla vs. Drwal is a Mixed Martial Arts event to be held on May 23, 2015 at the Ergo Arena, Poland.
Fight Card
Middleweight Poland Michal Materla (c) vs. Poland Tomasz Drwal
Heavyweight Poland Mariusz Pudzianowski vs. Brazil Rolles Gracie Jr.
Heavyweight Poland Karol Bedorf (c) vs. Australia Peter Graham
Light Heavyweight Croatia Goran Reljic vs. Slovakia Attila Vegh
Welterweight Poland Maciej Jewtuszko vs. Poland Kamil Szymuszowski
Middleweight Angola Jay Silva vs. Germany Aziz Karaoglu
Light Heavyweight Poland Tomasz Narkun vs. Poland Karol Celinski
Heavyweight Poland Jedrzej Mackowiak vs. Poland Michal Gulas
Lightweight Poland Patryk Grudniewski vs. Poland Grzegorz Szulakowski