Despite the fact that Richard Brehaut has made it completely clear that football is his #1 priority, there are still a few "fans" that opine that he shouldn't be allowed to play. I don't understand these people's sense of entitlement. Why should a fan be able to determine what players do in their free time? Brehaut's playing on the baseball team was discussed last year, and really, it didn't turn out to be a very big deal.
The list of quarterbacks playing major college football and baseball or other sports is extensive. Perhaps nobody performed the task better than John Elway, who played baseball during his years at Stanford. The list also includes Heisman trophy winning quarterbacks Charlie Ward, who played basketball at Florida St., and Robert Griffin III, who ran track at Baylor.
Chad Hutchinson played baseball at Stanford and eventually played in both the NFL and MLB. Dennis Dixon and Jake Locker both played baseball during their collegiate football careers during the offseason, albeit Locker played in a non-NCAA collegiate league and Dixon played in the minor leagues.
Kyle Parker played baseball during his short stint at Clemson before taking his first round MLB money and giving up the gridiron. Antwaan Randle El and Donovan McNabb played basketball at Indiana and Syracuse, respectively. I'm sure I'm missing even more, but the point is that it's more than possible for quarterbacks to play more than one sport in college.
In addition to the above, I'm pretty sure 99.99% of every Division I quarterback has had interests that consume some time during the offseason. Tim Tebow famously went on mission trips during the offseason. He won a Heisman and National Championship.
The point is, athletes agree to play football and perform certain obligations in exchange for a scholarship. They don't agree to give up their entire lives, and once they perform their football obligations, it's not up to the fans or anyone else to decide what they can and cannot do. Quite frankly, playing another sport is much more productive than going to the bar or sitting around playing video games.