When I said “Pros,” I meant the NFL. The point was that there are several Heisman trophy winners who never made it in the NFL. There are a lot of 1st team All Americans who never made it. Sam was All SEc. Wow. that does not guarantee you a spot on an NFL team.
Not several, 3. And two of those it was their decision. The guy in the 1950s decided to serve his country, so teams didn't draft him. Likewise Charlie Ward decided to go to basketball, or he probably would have been drafted. With Jason White, I'm not sure how much it was that he couldn't cut it or his knees were bad.
But you have to remember, those awards including the Heisman aren't given to people based on how they will do in the pros. Some players don't have the size, or speed, etc. to compete at that level, but can still play great in college.