Add Casey Fossum to the list of left-handed relievers in the organzation, according to a source.
Fossum, 33, pitched in Japan last season. He made three appearances at the major league level for the Mets in 2009.
Other left-handed relievers include Taylor Tankersley, Tim Byrdak and Mike O'Connor.
UPDATE: Fossum, reportedly, will head straight to minor league camp without a big league invite.