Marcus served as U.S. Navy corpsman and is now a first-class medic trained in trauma, pediatric cardiothoracic surgery and orthopedics. In previous seasons he's provided emergency support for the TIV team, but this year he's taking his place behind the wheel of the vehicle. His medical background makes him an asset to the team should anything go wrong, but his skill as a driver helps insure that nothing will. He's worked with Sean Casey's father, George, and his brother, Ryan, on IMAX projects in the past. This year he's responsible for getting Sean into perfect position to get his intercept shot.