Muñoz received an athletic scholarship to attend the University of Tennessee in Knoxville, Tennessee, and was a four-season starter for coach Phillip Fulmer's Tennessee Volunteers football team from 2000 to 2004.[3] He started 12 games as a true freshman in 2000, but missed his entire sophomore season in with a knee injury in 2001.[3] He returned to start 12 games as a redshirt sophomore in 2002, and started 13 games as a team captain during his 2003 junior season.[3]
For the first time in his college career, Munoz was not forced to undergo surgery during his 2003–04 offseason, allowing him to fully participate in training sessions and workouts that he had often missed during his previous offseasons. As a senior in 2004, he was again chosen as team captain by his teammates, was recognized as a consensus first-team All-American, and received the Draddy Trophy in recognition of his outstanding athletic and academic accomplishments.[3] He was also a second-team All-Southeastern Conference selection in 2003 and 2004.[3] During his four seasons playing for the Volunteers, he started in a total of 46 games.[6]
Despite his decorated college football career, Muñoz was not chosen in the 2005 NFL draft, largely because of his history of recurring knee and shoulder injuries.[5] In November 2005, he was elected trustee of Hamilton Township in Warren County, Ohio in his first run for elective office.[7] He subsequently earned a master of business administration degree (M.B.A.) from Miami University in Oxford, Ohio, and now is Vice President of Youth Football & Character Development at the Pro Football Hall of Fame.[8]