Moncada, the top-rated prospect by MLBPipeline.com, will not engage in baseball activities for the next two weeks after suffering the injury while swinging the bat. According to a statement by the Red Sox, the infielder is expected to be ready for the start of Spring Training.
The 21-year-old Moncada played in six games for Surprise, hitting .292/.370/.458 with a homer and three RBIs.
The switch-hitter, who was signed to a record-setting contract for an amateur in February 2015, was a September callup for the Red Sox this season. After a promising first couple of games, Moncada struck out in nine straight plate appearances and didn't play after Sept. 12.
It seems likely that Moncada will start the 2017 season in the Minor Leagues. He hasn't yet played at Triple-A.
Ian Browne has covered the Red Sox for MLB.com since 2002. Follow him on Twitter @IanMBrowne and Facebook. This story was not subject to the approval of Major League Baseball or its clubs.