Read that on Twitter earlier; figured someone would have mentioned it before I got back.
I'll try to find the tweet again; it was someone from the (not Indy) media.
Even better, a link to a story about it on ESPN Chicago:
A day after injuring his ankle in his team's first playoff loss, Chicago Bulls point guard Derrick Rose arrived at Sunday's film session wearing a walking boot.
Rose did not participate in the shootaround after the team watched film. He is expected to get an MRI on Sunday afternoon and will be re-evaluated by team doctors at that time.
Rose turned his ankle driving to the basket late in the first quarter. He didn't appear to make contact with any other player.
"I really can't explain it," Rose said Saturday. "I just took off wrong and my weight just pushed over my ankle and it ended up twisting."
Rose had an X-ray following Saturday's loss to the Indiana Pacers, and results were negative.