Mariano Rivera 5

Rivera is an amazing and underrated pitcher. He is slender with a strong arm and basically throws variations of a fastball exclusively ,yet he's very hard to hit and is practically automatic as a closer. He has a simple, effecient delivery that maximizes the arm strength he has and allows good movement on his pitches. It's very fluid and doesnt put stress on his arm and his fastball is so explosive from all that. An all time great closer.