From the media availability during the Celtics' morning shootaround in Indianapolis today:
Brad Stevens said the other 4 starters won't see minutes increase with Crowder out; young guys will just play more.
Stevens on lineup w/o J. Crowder: "What's going to change is you're going to have a young guy that's going to play more. Maybe 2, maybe 3." — Boston Celtics (@celtics) March 15, 2016
Here's more from Stevens (and Evan Turner) when it was first learned that Jae Crowder would be out for an extended time:
Turner on young guys: "I think they’ll probably be ready.