Peter Onorati played Jeffery “Jack” Mumford in S.W.A.T. as part of the main cast in season 1, but was surprisingly slowly written out of the show years later. Onorati starred alongside Shemar Moore, Jay Harrington, and Alex Russell, some of whom still appear on the show. Onorati’s character, Jack, was a SWAT leader, and his team often worked closely with Hondo’s team.