Chicago Bears middle linebacker D.J. Williams was taken off the practice field on a cart after suffering a calf strain on Wednesday morning during training camp, the team announced.
Williams was signed by the Bears in March to replace longtime standout Brian Urlacher. The nine-year veteran saw limited action last season with the Denver Broncos, missing seven games because of suspensions and starting once.
But the Bears are counting on Williams to fill a void this season in the middle of their defense after Urlacher was not re-signed. It is unknown how long Williams will be sidelined, but the NFL Network reported his status as week to week.
With Williams out indefinitely, the Bears are left with rookies Jon Bostic, the team's second-round pick in the 2013 NFL Draft from Florida, and Khaseem Greene as candidates for the middle linebacker spot.