Comments on: The RBI Is Dead, All Hail tRBI+

By: RE24

RE24 — Sun, 31 Jan 2016 19:48:41 +0000

You might be interested in RE24 runs scored/prevented.

definition: http://www.fangraphs.com/library/misc/re24/

2015 leaderboard: http://www.fangraphs.com/leaders.aspx?pos=all&stats=bat&lg=all&qual=y&type=3&season=2015&month=0&season1=2015&ind=0&team=0&rost=0&age=0&filter=&players=0&sort=6,d

By: Kevin Creagh

Kevin Creagh — Tue, 15 Sep 2015 11:44:34 +0000

There’s no real good “off the shelf” stat to capture what I wanted to, so I had to do the AVG MOB by PA MOB to try to get the walks and sac flies. I know it’s not perfect, but there isn’t really a “batting average with men on base based on plate appearances” number, unfortunately.

By: Bert

Bert — Sun, 13 Sep 2015 16:33:14 +0000

I’m not an expert, but I’m confused by this part of the calculation:

“Then take the player’s batting average with men on base (AVG MOB), not batting average with runners in scoring position, and multiply that by his PA MOB. This is a somewhat crude attempt to capture a total RBI chances stat. The plate appearances, in lieu of at-bats, will grab bases loaded walks and sac flies that result in RBI’s.”

Using Plate Appearances instead of At-Bats will incorporate walks, sac flies, HBPs, etc., but multiplying by batting average––doesn’t that take credit away from RBIs on non-hits? Unless you don’t want to give credit to the hitter for sac flies, etc.

By: Kevin Creagh

Kevin Creagh — Wed, 09 Sep 2015 18:34:14 +0000

Thanks for reading, Harry. Spread the word about TPOP!

By: Harry Schade

Harry Schade — Wed, 09 Sep 2015 16:47:03 +0000

Both ideas (Kevin’s and David’s) seem to provide a measurement that refines the situational impact of a baseball event. Have long forgotten my stats, but these seem promising…Luv the sight BTW!

By: Kevin Creagh

Kevin Creagh — Wed, 09 Sep 2015 13:48:42 +0000

I really like this idea, David. I’m just trying to think how it can be tracked in any other way than “live”. Meaning, how could someone who is not watching…say…the SEA-TEX game at that moment, calculate the RAP? Go through the game logs? I do like it, but I’m trying to figure out the logistics.

By: David Foster

David Foster — Wed, 09 Sep 2015 01:35:39 +0000

I propose this: runner advancement percentage (RAP), Ie, number of runners-bases advanced per opportunity. It goes like this:
If a batter comes up w/ the bases empty, his total runner-base advancement opportunity is four, as he can potentially advance a runner (in this case, himself) four bases (with a home run). If he would triple, for that AB his percentage would be .750.
Where it gets interesting is w/ men on base: each runner adds potential runner advancement bases for the batter, depending on what base they’re on. Thus, a runner on third could be advanced one base; a runner on second two bases; a runner on first, three.
So w/ the bases loaded, the total runner base advancement potential is 1 (runner on 3rd) plus 2 (runner on 2nd) plus 3 (runner on 1st) plus 4 (batter himself) for a total runner base advancement potential of 10. A grand slam would produce the max, or 10 runner bases advanced; a single scoring two runs leaving runners on 1st and 2nd, for example, would yield an advancement number of 5 (runner on 3rd, one base advanced; runner on 2nd, two bases advanced; runner on 1st and the batter, one base each) for a percentage for that AB of .500 (5/10).
Of course, over the season the stats would accumulate, like any over; and the ABs w runners on would automatically be properly weighted to show success (or failure) based on opportunity.