Tag Archives: Rays

Which Teams Use Their Bullpens Optimally?

Earlier this week, Casey Boguslaw posted an excellent article over at Baseball Essential regarding Lineup Optimization. The premise of his argument revolved around comparing a team’s wRC+ and their run production per game. In theory, a team with a low wRC+ but high R/G implies that the lineup has been optimized, i.e. they are squeezing every run out of which they are capable out of the lineup. Conversely, a team with a high wRC+ but low run production is suboptimal, and not scoring as much as they should.

Let’s apply this concept to bullpen use. Each team has a certain number of relievers they are able to use in different situations. Similar to the lineup, different points in the game are more or less crucial. This is tracked by the leverage index (pLi). In a few words, a game situation of average leverage has a pLi of 1, with more intense game situations greater than 1, while less intense situations are less than 1. For a bullpen to be optimized, as the leverage increases incrementally, better and better relievers must be used, i.e. the relationship is roughly linear.

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AL Midseason Debuts: Prospects Looking to Make an Impact – #1 Blake Snell

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With the 2016 season underway, each team looks to compete immediately with the pickups they made in the offseason. But as we saw around the MLB in the 2015, the midseason callups can have as big of an impact as the players obtained in free agency. This series will detail the 5 prospects in the AL looking to make the biggest impact on their respective teams this season.

For the purposes of this series, we will set a few baseline criteria:

  1. The prospect cannot have any previous Major League experience prior to the 2016 season.
  2. The prospect must already be reasonably close to the MLB.
  3. The prospect must play a position of need for his big-league squad, and this need cannot be due to injury.

Be sure to check out the impact cases for the prospects previously covered:

#5 – Sean Manaea, OAK, LHP

#4 – Tim Anderson, CHW, SS

#3 – José Berríos, MIN, RHP

#2 – A.J. Reed, HOU, 1B

And for the previous series detailing the NL version of this list, check out the posts here.

Continue reading AL Midseason Debuts: Prospects Looking to Make an Impact – #1 Blake Snell