The smallest NFL football player since 1990 is Trindon Holliday - 5 feet 5 inches tall and weighing 165 pounds. www.nfl.com/player/trindonholliday/497218/profile. All players are required to be in great physical condition. While many people aspire to become professional sports players, the number actually making it are low. That said, those who have the passion, perseverance and skill are the one's who make it.