Don't forget Anderson, currently #20, Becker, Nedovyesov, Devvarman, and one of my faves, Blaz Rola, all college guys. If you saw Anderson as a freshman and then as a senior, the development was remarkable. Never would have happened if he went solo into the pros imo. The college development opportunity allows for late bloomers, the physically underdeveloped, the financially strapped players to get themselves ready for the grind of a pro career. I think there's one American junior a year who might have the game, the body, the mind, the results, and the money to go directly. Young, Sock, Querrey, for sure. (College certainly wouldn't have helped Young's mind.) Fratangelo, Krueger, they were bubble kids, but since they probably received financial backing, give it a go. Life's not over if you don't get a college education or you can go back like Devin Britton is doing. But like Mikej says if you're a hundred a year talent, college makes more sense. You get an education, plus the 50k to 75k in coaching, training, traveling, clothing, and all those ancillary expenses that going solo incurs.