Rhett accepted an athletic scholarship to attend the University of Florida in Gainesville, Florida, and played tailback for coach Steve Spurrier's Florida Gators football team from 1990 to 1993. Rhett broke Gator alumnus Emmitt Smith's former Gators career rushing record, finishing with 4,163 yards and thirty-four touchdowns, 1,230 yards receiving and two touchdown receptions, and leading the Gators in rushing for all four seasons of his college career. Memorably, he rushed for 193 yards against the Kentucky Wildcats in 1992, and for 196 yards against the Auburn Tigers in 1993. Aided by his consistent running game, the Gators won the Southeastern Conference championship in 1991 and again in 1993. As a senior team captain, Rhett was named most valuable player of the 1994 Sugar Bowl, rushing for 105 yards and three touchdowns in the Gators' 41–7 victory over the West Virginia Mountaineers. He was a first-team All-SEC selection in 1991 and 1993, a first-team All-American in 1993, and was chosen by his teammates as the Gators' most valuable player in 1993. During his time at Florida, Rhett was initiated as a brother of Omega Psi Phifraternity. He graduated from Florida with a bachelor's degree in 1995, and was later inducted into the University of Florida Athletic Hall of Fame as a "Gator Great" in 2005. The sports editors of The Gainesville Sun ranked him as No. 34 among the 100 all-time greatest Gators of the first 100 seasons of Florida football in 2006.
Professional career
Rhett was chosen by the Tampa Bay Buccaneers in the second round in the 1994 NFL Draft, and played seven professional seasons from to. During his rookie season with Tampa Bay, he rushed for 1,011 yards and seven touchdowns. Rhett had a career year the following season when he rushed for 1,207 yards and eleven touchdowns. He was involved in a contract hold-out before the season, but still led the Buccaneers in rushing despite appearing in just nine games. Rhett played four more years in the NFL, but he never matched the numbers that he produced during his first two seasons. His best post-Tampa Bay season came in when he rushed for 852 yards for the Baltimore Ravens. Rhett's career ended when the Cleveland Browns waived him immediately before the start of the season. During his seven NFL seasons, Rhett rushed for 4,143 yards and twenty-nine touchdowns; he also had eighty-nine receptions for 552 yards and three touchdowns.
Rhett is the father of three children: son Errict, Jr., and daughters Morgan and Amaurri. All three are actively involved in sports; he coaches his son's Optimist league junior football team, and regularly attends his daughters' track meets. When his playing career ended after the 2000 NFL season, Rhett returned to South Florida, where he had grown up. Today, he is the chief executive officer of Errict Rhett Custom Homes and the Errict Rhett Foundation. Rhett's foundation emphasizes charitable activities that benefit underprivileged children, including an after-school support program, college scholarships, and a mentoring program.