Complex sentence: Rany Jazayerli (born June 14,1975), a Chicago-area dermatologic surgeon, is a co-founder and a writer for Baseball Prospectus, for whom since 1996 he has co-authored many of the annual "Baseball Prospectus" volumes.
Split into simpler sentences: Rany Jazayerli (born June 14,1975), a Chicago-area dermatologic surgeon, is a co-founder and a writer for Baseball Prospectus. Since 1996 Jazayerli has co-authored many of the annual "Baseball Prospectus" volumes.