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Relief Pitching Newsbeat

Saturday, November 01, 2014

Tangotiger Blog: Are there more mid-inning relief changes these days?

Commenter “fivetwentyone” wrote:

heres what I got from retrosheet, so for example, 1.02 start-of-inning changes and 1.93 mid-inning changes, per team per game,

. Comments include a plot of annual start-of-inning changes and mid-inning changes since 1950.

bobm Posted: November 01, 2014 at 01:00 PM | 11 comment(s)
  Beats: relief pitching

Friday, September 19, 2014

Lindbergh: Dellin Betances’s Season & Bullpen Strategy

Dellin goes electric?

Despite being a setup man with only one save on the season, Betances has been lights-out enough to lead the majors in WPA — the first time a setup man has done so since Tyler Clippard in 2011. On the post-’88 leaderboard, though, the closers rise to the top, and Betances has to settle for a spot just inside the top 60.

Commissioner Bud Black Beltre Hillman Posted: September 19, 2014 at 05:50 PM | 9 comment(s)
  Beats: grantland, relief pitching, yankees

Lindbergh: Where Dellin Betances’s Season Ranks Historically, and What It Teaches Us About Bullpen Strategy

Despite being a setup man with only one save on the season, Betances has been lights-out enough to lead the majors in WPA — the first time a setup man has done so since Tyler Clippard in 2011. On the post-’88 leaderboard, though, the closers rise to the top, and Betances has to settle for a spot just inside the top 60.3

The Goldilocks stat we’re seeking — a counting stat that doesn’t discriminate based on leverage — is Run Expectancy Wins, or REW. Using a framework similar to WPA’s, REW calculates the difference between the number of runs a team is expected to score in the inning at the start and the end of each play, credits/debits the batter/pitcher accordingly, and then compiles the differences to arrive at a full-season total of wins added or subtracted. But because it’s not sensitive to inning or score — a two-out, bases-loaded strikeout counts the same in the seventh inning of a six-run game as it does in a ninth-inning tie — it’s closer to context-neutral than WPA, allowing us to pit Betances against guys who got the chance to finish more games.


 

 

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