Top Phillies prospect J.P. Crawford had arthroscopic surgery to remove a loose body from his left knee on Wednesday, the team announced Friday night.

The surgery was termed a success. Crawford will rest for four weeks and be ready to go for spring training in February.

Crawford, 21, played at Double A and Triple A in 2016 and hit .250 with seven homers, 43 and a .688 OPS.

Crawford, a native of southern California, was the Phillies' first-round draft pick in 2013. He is widely considered the team’s shortstop of the future, but Freddy Galvis is having something to say about that in the majors this season (see story).

It’s likely that Crawford will open the 2017 season back at Triple A Lehigh Valley. He played 87 games there this season and hit .244 with a .647 OPS.