Baseball players have a lot of down time, especially starting pitchers. Historically, they filled their time golfing or fishing. Today, there is a lot of electronic gagetry to keep them busy. Tons of baseball players have been avid golfers, and many are washed up as baseball players by their early 30's, certainly young enough to be a professional golfer. None have been able to do it. Zero. They can't master the game. Could they have mastered the game if they grew up playing it and training at it? I am sure that several could have done it, but starting as adults, they can never refine their skill enough to be consistent enough to compete with the pros.