In 1991, Cook was fourth in the NFL in receptions with 83.
He is currently the head football coach at Iowa City Regina High School in Iowa City, a school which plays football in Class 2A. In 2010, he led the team to an undefeated season and a 2A State Championship. One of Regina's 14 wins was against Class 3A's #1 Ranked team, the Solon Spartans, of the WaMaC Conference, ending Solon's 44 game winning streak. In the 2011 Season, Marv lead the Regals to a 24-20 win over Spirit Lake giving the Regals back-to-back 2A State Championships.
Marv attended high school in West Branch where his football jersey is retired and in the halls of West Branch High School. West Branch and Iowa City Regina are both in the River Valley Conference.