Baseball players aren’t known for toughness, but they might be the toughest pro athletes. Ballplayers must play 162 games in 180 days, with sprains, nicks, dings and lingering injuries. No other pro sport features a more grueling regular-season slate of games. Throw in the oppressive summer heat, and the insane travel schedule, and ballplayers must battle physical, mental and external elements. The players who battle the best can conquer everything baseball throws at them and earn a special place in the game. These are the toughest Major League Baseball players of all time.