Marvin is an active Major League Baseball umpire and Crew Chief who helped create the BLUE Crew Ticket Program, along with former Minor League Baseball crew member and friend, Samuel Dearth. Marvin made his Major League Baseball debut in 1998 and has worked one World Series, two All-Star Games and two World Baseball Classics. He serves as a director at-large with UMPS CARE Charities and is active with the BLUE Crew Ticket Program.