Today, I will concentrate on my newest tool, Position Players Playing Through Injury Finder, and report the fastball speeds of a few pitchers who recently returned from the disabled list.
• Injuries and their effects continue to be one of the more under-researched areas of baseball. As more and more DL data has become available, we can make better conclusions on the effects of injuries. Even with with 100% complete and accurate DL information, the times a hitter plays through injuries isn’t recorded. I have been trying to note these players and the stats which seem effected. I have found power, contact and speed (Duh) to decline as a results of an injury.
With this information, I decided to try to reverse-engineer an equation to find players with declining rates in speed, contact and power. The equation is not based off any extrapolated values, just what I thought would work (similar to the QB passer rating in the NFL). Also, I am not close to being done with it. I used previous season data and need to improve these values (weighting and regression). Also, I just can’t compare to preseason projections because they don’t calculate some values I look at like Contact%. Also, it can’t look at rookies at this point. Even with these limitations, the results have been encouraging.
Here is the top 25 leader board with players over 100 PA this season and at least 500 total PA in the previous three seasons.
Position Players Playing Through Injury Finder
(Do you have a better name, let me know and I will gladly use it)
Going through the list, here are some players working through injuries. I didn’t research each name, so I am am probably missing some reported injuries.
Right now an Injury Factor over 100 seems to be a decent indicator a player trying to play through an injury. I seems like Ike Davis’s struggles may be injury related.
I will be putting out a top ranking each MASH report so readers may know if an injury may be behind a player’s struggles. Also, I will continue to improve the process.
• Joba Chamberlain’s velocity is OK.
• Josh Fields’s velocity seems OK (SSS even for velocity)
• Franklin Morales’s velocity is not OK. It is down about 2-3 mph.
Players on the DL
(*) 15 Day Disabled List
(**) 60 Day Disabled List
(***) 7 Day Concussion List
Red colored entries are updates since last report.
Jeff, one of the authors of the fantasy baseball guide,The Process, writes for RotoGraphs, The Hardball Times, Rotowire, Baseball America, and BaseballHQ. He has been nominated for two SABR Analytics Research Award for Contemporary Analysis and won it in 2013 in tandem with Bill Petti. He has won three FSWA Awards including on for his MASH series. In his first two seasons in Tout Wars, he's won the H2H league and mixed auction league. Follow him on Twitter @jeffwzimmerman.