This is going to sound horrible...
But the better player Sam becomes, the better it will be for gays in all sports, not just football. If he becomes a kick-ass player in the league, his teammates will accept him, and no longer will their be thoughts and voices saying "gay people can't make it in the NFL, they don't have the mentality"
If Jackie Robinson hadn't been as good a baseball player as he was, how long would it have been before another African American player would have been allowed in the MLB?
Here's to hoping Sam gets drafted by a good organization (with limited media coverage, AKA anywhere but NY) who has a plan for Sam and he develops quickly into one of the leagues better pass-rush specialists.