October 14, 2014 Video: GMA Impact Jiu-Jitsu shares the moment six students earn their black belts Michael Chapman, owner and head coach of GMA Impact Jiu-Jitsu in Beaverton, OR, has invited us to share the moment that six of his students… Read More→
February 17, 2012 Submission Wrestling League ready to kick off GMA member Michael Chapman invites all for the 8th annual Sbmission Wrestling League, this coming spring. The leader of Impact Jiu-Jitsu is the organizer of… Read More→
November 10, 2011 Impact Jiu-Jitsu joins the GMA army The GMA has a new member in the state of Oregon. Impact Jiu-Jitsu is our newest associate. The team's head coach is black belt Michael Chapman. The… Read More→