At the end of the game, there's no one more reliable to finish the job than the late-inning ace, the closer. The title speaks for itself.
Though many say it is the most "overrated" position in baseball, that's hard to agree with especially because these men come in when the games are at their climax and the pressures that come with it, make this position a daunting challenge.
After all, the last three outs are also the toughest. Few know this better than the men who have excelled in these situations.