The Facts: Following up on the ongoing story. ... While HC Jim Caldwell refused to discuss Ebron's injury Monday, a source told ESPN's Adam Caplan that Ebron is dealing with a "pretty decent [right] ankle sprain."

Diehards Line: Caldwell would only say "we'll see" when asked if Ebron would practice this week when Detroit and Pittsburgh hold joint practice in Latrobe, Pennsylvania, and whether he would play in Friday's preseason opener at Pittsburgh. With Ebron out, veteran Matthew Mulligan and undrafted rookie Cole Wick took first-team reps. The Lions now have their top three tight ends out with injury. Brandon Pettigrew remains on the physically unable to perform list while recovering from a torn ACL. Tim Wright is out for the season with a torn ACL and then there's Ebron. Ebron spent Monday on the side trying to tutor Wick, often explaining things to him between reps. Ebron, who is expected to be the Lions' top tight end this season, was having a strong camp.