Lewis, who played for the New York Giants in the 2020 season, fielded interest from teams as recently as last week, according to ESPN, but the tailback opted to step away from playing in the league.
The 5-foot-8 Lewis, who primarily served as a third-down back, recorded 3,833 yards from scrimmage and 22 total touchdowns over his NFL career. He was a member of the Patriots' Super Bowl teams in the 2016 and 2017 seasons.
In the 2020 season, Lewis notched 115 rushing yards on 29 carries while catching 19 passes for 127 yards for the Giants, scoring three touchdowns.
Lewis, who will turn 31 in September, didn't play in the 2013 and 2014 campaigns while he recovered from a broken leg.