Reliever Leveraging

Evaluating relief pitchers and team bullpens by employing Tango Tiger's Leverage Index and Win Probability Added statistical measurements is starting to gain momentum in the sabermetric on-line community. Sal Baxamusa at The Hardball Times delves into why LI is different for batters as compared to relievers.

Since major league managers have a large degree of control of when to bring in their relievers, evaluating relief pitcher leveraging may actually become one of the most important measures of managers in-game acumen.