Relief pitchers have important roles in baseball today, often coming in to pitch at some of the game's most critical and exciting moments, but they have not alw

The all-time career leader in saves, with 652, Mariano Rivera is one of the greatest professional athletes in history. Since taking over the closer’s role for

Baseball Hacks isn't your typical baseball book--it's a book about how to watch, research, and understand baseball. It's an instruction manual for the free base

Major leagues' most prominent relief pitchers, their role as closer, and how they cope with stress on the mound.