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→
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→