Problem is, as with everything else if he did that, when the story came out (notice I didn't say "if"), he'll be in bigger trouble.
Get your lawyer, own up to it, settle out-of-court and hope a judge only gives him probation and community service. Maybe the league'll let him off as well.
By fleeing the scene, he gets a misdemeanor...DWI is worse.
My guess is he's not going to get a break unless he shows some remorse....if indeed he did it.