Rany Jazayerli

Rany Jazayerli (born June 14, 1975), a Chicago-area dermatologist, is a co-founder of and writer for Baseball Prospectus. He developed the statistical concept of Pitcher Abuse Points (PAP), which relates to high pitch counts in baseball.

Jazayerli is a graduate of Johns Hopkins University and the University of Michigan School of Medicine. He is a board-certified dermatologist and a Fellow of the American Academy of Dermatology.

Since 1996 Jazayerli has co-authored many of the annual Baseball Prospectus volumes. He also writes occasional “Doctoring the Numbers” columns for BaseballProspectus.com in which he investigates topics from a sabermetric perspective. He is the creator of the sabermetric measure of "Pitcher Abuse Points." Jazayerli has published seminal research on the relative merits of the 4-man and 5-man pitching rotation. His most important recent major research contribution is a series of twelve articles published on BaseballProspectus.com in 2005-2006 reporting a massive study of the changing patterns of the Major League Baseball player draft.

He and Rob Neyer of ESPN co-authored a blog called “Rob & Rany on the Royals,”[5] in which they both would lament the performance of the Kansas City Royals major league franchise. He now writes his own blog, "Rany on the Royals,"[6]. Since 2011 he has been a contributing writer to Grantland.

He has also contributed essays on politics to FiveThirtyEight.com.

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