Jan Dukes

Jan Dukes is the extreme version of a specialist. +0.2 of roto value came from ERA, yet his career total is only -6.9. 1969 was the high-water mark, worth -2.1, 224th that season and 33254th of 51,303 player-seasons on record. On the credit side, ERA (+0.2) and WHIP (+0.1). On the debit side, strikeouts (-3.0) and saves (-1.3).