The Patriots are set to report for training camp in late July, but Michel has already returned to the team's facility in Foxborough, Mass., as part of his rehabilitation, according to ESPN. His timetable for a return is not yet known.
Michel has been the Patriots' leading rusher in each of the last two seasons, finishing last year with 912 yards and seven touchdowns on 247 carries. In the 2018 campaign, he recorded 931 yards and six touchdowns on 209 carries.
New England selected Michel in the first round of the 2018 NFL Draft out of Georgia. The tailback has battled multiple knee injuries since entering the league, but he has missed only three games.