Crawford left Friday's game against the Brewers in the first inning after beating out an infield single on Casey McGehee's throw on a chopper to third. He was replaced by Darnell McDonald. The team called up Josh Reddick to take his place.
Silverman also tweeted that Boston manager Terry Francona said the medical staff told him Crawford would need 10 to 14 days to recover, so putting him on the DL was a "no-brainer."
After a slow start that saw him hitting .155/.204/.227 at the end of April, Crawford has hit .295/.318/.476 since with five homers.For more baseball news, rumors and analysis, follow @cbssportsmlb on Twitter or subscribe to the RSS feed.