According to ESPN Insider:
Aug 29 - ESPN The Magazine's Buster Olney reports the Mets and Red Sox have discussed a trade that would send Trachsel to Boston.
The Mets are said to be asking for a relief pitcher from the Red Sox in return for Trachsel, who has cleared waivers. The Mets could also consider acquiring either John Olerud or Roberto Petagine, both first basemen, from Boston.
Trachsel, who pitched eight shutout innings in his first start of the season last Friday, is presently a part of the Mets' bullpen.