WPA:MVP as LI:GOD

A few people in the word (read: one) may have noticed that I did not post either an MVP or Game O' the Day for Monday, April 15.  While those posts were driving great traffic, my intention was to bring awareness to two statistics that tell the story of an MLB game, not necessarily recap each night of baseball.

WPA:MVP

Win Probability Added (WPA) is a stat that measures a players impact on the game by measuring how their offensive performance impacts their team's win expectancy.  Here is an example from Fangraphs: 

For example, say the Rays have a 45% chance of winning before Ben Zobrist comes to the plate. During his at-bat, Zobrist hits a home run, pushing the Rays’ win expectancy jumps to 75%. That difference in win expectancy (in decimal form, +.30) from the beginning of the play to the end is Ben Zobrist’s WPA for that play. If Zobrist strikes out during his next at bat and lowers his team’s win expectancy by 5%, his overall WPA for the game so far would be +.30 – .05 = +.25, as WPA is a counting statistic and is additive.


Basically, WPA tells you whose batting outcomes had the biggest impact on the game.  Therefore, the timing and context of the plate appearances are very important.  Thus confirming what we already know but is hard to capture in the box score: a 2-run game winning homerun has much more impact than a grand slam when you are up by 10.

For me, WPA is the best way to evaluate a player's performance on a game-by-game basis and it is also interesting to look at over a whole season (The 2012 season leader in WPA was Mike Trout with 5.32 WPA).

LI:GOD

Leverage Index (LI) captures the change in win probability resulting from the game action.  Here is an example from Hardball Times:

If there is a game with one team leading by ten runs, the possible changes in win probability, whether the event is a home run or a double play, will be very close to negligible. That is, there won't be much swing in any direction.  But, in a late and close game, the change in win probability among the various events will have rather wild swings. With a runner on first, two outs, down by one, and in the bottom of the ninth, the game can hinge on one swing of the bat—a home run and an out will both end the game, but with vastly different outcomes for the teams involved. 

Blowouts are going to have a low average LI (aLI) because there is not much change in the probability in who will win the game.  Therefore, games with a high average LI are going to be the most interesting game of the night because they will have gone back and forth without one team really taking control of the game.

Fangraphs posts live WPA and LI information for every game.  So, instead of having me summarize every night in the MLB take a look for yourself.

MLB MVP and Game O' the Day - April 14, 2011 - Pence Helps Gigantes Beat the Cubbies; Rauch is Still Tall

4/14 MVP: Hunter Pence, RF, San Francisco Giants - 3-4 (1 HR), 2 R, 1 RBI, 1 BB, 1 SB, 0.47 WPA.  Clutch Moment: Homerun in the 9th that tied the score at 7-7.

4/14 GOD: Philadelphia Phillies (2) @ Miami Marlins (1) - Turning Point: Jon Rauch makes another appearance in the Game of the Day section here at Marcello Ball, and it is not for being an effective pitcher.  Instead of keeping the score tied to give a chance for the Marlins to take the lead in the bottom of the ninth, Rauch gave up a bomb to Laynce Nix in the top of the inning to give the Phils a 2-1 lead.  Unfortunately, being the tallest major league baseball player in the history of the game does not automatically mean you get people out.

MLB MVP and Game O' the Day - April 13, 2013 - Pujols is Clutch; Sox Win in 10

4/13 MVP: Albert Pujols, 1B, Los Angeles Angels of Anaheim - 2-3, 1 R, 2 RBI (GW), 0.73 WPA

4/13 GOD: Tampa Bay Rays (1) @ Boston Red Sox (2) (10 innings) - Turning Point: With one out in the bottom of the 10th, Jacoby Ellsbury singled off of Rays reliever Brandon Gomes.  Ellsbury then stole second and advanced to third on a throwing error by Rays catcher Jose Lobaton.  Ellsbury stole the base easily, but the throw from Lobaton down to second was not that bad.  The burden of the error may belong to Yunel Escobar for his lackadaisical attempt to catch the off target throw.  Escobar lunged for the ball to but the ball careened off his glove and into centerfield, allowing Ellsbury to advance to third.  The Rays then brought the infield in and Shane Victorino grounded a ball up the middle, which Escobar dove for and caught, but for some reason threw to first.  Ellsbury would have been safe at home regardless of the throw, but throwing it to first base was totally useless.  Great game overall and the Sox did a nice job capitalizing on some mistakes in the 10th by the Rays.

MLB MVP and Game O' the Day - April 12, 2013 - Masterson = Masterful; Rauch = Tall

4/12 MVP: Justin Masterson, SP, Cleveland Indians - 9.0 IP, 0 R, 7 K, 1 BB, 5 H, 0.676 WPA

4/12 GOD: Philadephia Phillies (3) @ Miami Marlins (1) (10 Innings) - Turning Point:  After striking out our boy Kevin Frandsen to start the inning, Jon Rauch gave up a line drive single to Ben Revere followed by a infield fly out by Jimmy Rollins.  Chase Utley then tripled to center, scoring Revere and giving the Phillies a 2-1 lead.

MLB MVP and Game O' the Day - April 11, 2013 - Juan Uribe, Softball Player

4/11 MVP: Juan Uribe, PH, Los Angeles Dodgers - 1-1 (1 HR), 1 RBI, 0.292 WPA.  Don't mess with Juan Uribe or he'll do this.  Once again, it's not how much you do, what matters is when you do it.

4/11 GOD: Texas Rangers (4) @ Seattle Mariners (3) - Turning Point:  Felix Hernandez ran into a bit of trouble in the 5th.  With the scored tied 2-2, Ian Kinsler lead the inning off with a single to left and reached second on a wild pitch.  Elvis Andrus then walked.  Hernandez settled down and got the next two outs without a hit.  Lance Berkman grounded into a fielder's choice and Adrian Beltre struck out.  David Murphy would not let Felix off the hook though.  He singled to center, scoring Kinsler and advancing Berkman to third.  Nelson Cruz finished off the scoring by doubling to left, scoring Berkman and lifting the Rangers to a 4-2 lead.

MLB MVP and Game O' the Day - April 10, 2013 - The New Manny

4/10 MVP: Manny Machado, 3B, Baltimore Orioles - 1-5 (1 HR), 1 R, 3 RBI, 0.446 WPA.  Timing matters people, especially at Marcello Ball.  It is not how much you do, it is what you do and the impact of it.  Manny Machado had great timing last night.

4/10 GOD: Baltimore Orioles (8) @ Boston Red Sox (5) - Turning Point: Joel Hanrahan in, top 9, Red Sox up 5-3.  Chris Davis bomb, 5-4.  Matt Wieters strikeout, J.J. Hardy foul out.  2 outs, Hanrahan still in.  Ryan Flaherty singles to left, Nolan Reimold walks, Nate McLouth walks.  Hanrahan clan is not happy, but still alive.  Oops, nevermind.  Wild pitch, Alexi Casilla (pinch runner for Flaherty) scores.  Bad news for the Hanrahan clan, it is all tied up.  Marcello Ball MVP Manny Machado strides to the plate and deposits the Hanrahan offering into the bleachers.  8-5 B-more.  Oriole Magic!  Manny for MVP!

MLB MVP O' the Day - April 9, 2013 - Catchers are the Rage

4/9 MVP: John Jaso, PH --> C, Oakland Athletics - 1-2 (1 HR), 1 R, 3 RBI, 0.516 WPA. Once again, the quickest way to earning MVP here is a pitch hit bomb.

4/9 GOD: Pittsburgh Pirates (6) @ Arizona Diamondbacks (5) - Turning Point: Bucs down 3-4 top of the 4th. Brandon McCarthy on the mound for the D'Backs, Neil Walker at the plate, James McDonald on third base, and Starling Marte on second. Walker singles to center, scoring McDonald and Marte.  Buccos up 5-4.  D'Backs never get the lead back.