According to a tweet from Jerry Crasnick of ESPN, the Mets and Red Sox have discussed a possible trade involving Mike Lowell & Luis Castillo.   He adds "Not sure how serious it is."A tip of the TRDMB cap to Howard Megdal of MLBTradeRumors for the hint, who points out that Castillo is owed $12 million over the next 2 years whereas Lowell is owed $12 million for 2010, making it equal in terms of salary.Lowell, left, chatting with new Met Jason Bay (#44)- Fellow TRDMB author Mr. North Jersey wonders "...if we send Castillo to Boston for Lowell would Boston then be doing this as part of a bigger trade that would then send Pedroia to San Diego in return for Gonzalez?"   What do you think folks?UpdateRed Sox ink Adrian Beltre for 2 years. 9 mill for 2010 and a 5 mil option for 2011(1 mill buyout)