No way he gets jail time. The groundwork for that is already being laid. (It's good that you've taken full advantage of the bump down that a 0.15% (ie, felony) would ordinarily qualify you for.)
But can you imagine the PR explosion of having a coach pictured in a jumpsuit & cuffs roaming your sidelines...These are 'supposed' to be leaders of men, remember...
The logic is that this is his 3rd offense. In his job, he's in a unique position to influence & shape the young men he coaches. So, he should be held to a very high standard. Sometimes, your sin is forgiven, but your still left with the consequences. In this instance, he's clearly being given a slap on the wrist. And, if it has been acknowledged that he was, in fact, drinking with players on the night in question...then the UofN should be flat out ashamed of itself...that is reprehensible, imo.