The slugging first baseman is second on the team in home runs with 13 .
Baseman 's . 770 OPS baseman 's his lowest mark since 2009 baseman 's and his 115 OPS+ baseman the worst he 's posted in four years .
The slugging first baseman is second on the team in home runs with 13 , but his . 770 OPS is his lowest mark since 2009 , and his 115 OPS+ is the worst he 's posted in four years .