Purdy came in after the lightning delay because Haarberg tightened up, so the issue of who starts against Michigan is in play.
You’d hope he could get loose in the next week…?
Depends on what tightened and when, he could have a soft tissue injury and those can take days to fully recover.
In that case I’d say that’s not “tightness” at all 
Looks like he’s 100% though, according to coaches.