The official spring roster has been released (PDF) and there is no DT Michael Starts, LB Daniel Cobb and S Chris Yeakey. Right now, those appear to be the only defections and per the LAJ, head coach Kliff Kingsbury has said that Starts' status is unresolved.
The linked LAJ article has some additional observations, including the fact that LB Daniel Cobb is not on the roster and has graduated and that S Chris Yeakey did not receive a 6th year of eligibility. Never-used TE Cameron Wright has been flipped to defensive line, but I don't really think that's a big deal. I've got a post with a lot more links scheduled for the morning. #almosthere