1992 - Salty Parker died: Salty Parker managed the Mets for the last 11 games of the 1967 season, taking over for Wes Westrum. He was replaced as Manager by Gil Hodges in 1968. Parker had a record of 4-7 as Mets manager.
1975 - Cleon Jones was released by the Mets
1990 - Mets traded 1B Mike Marshall to the Boston Red Sox for Greg Hansell, Paul Williams, and Ed Perozo.
2001 - Mets traded #99 Turk Wendell and Dennis Cook to the Philadelphia Phillies for LHP Bruce Chen and Adam Walker.
Turk Wendell is my favorite Mets reliever of all time. He was such a character, who wouldn't think twice about dusting a player off. The fans grew to love his antics, whether it was slamming the rosin bag down before a pitch, jumping over the foul line, brushing his teeth in between innings, or having all of his contracts end with .99 (i.e. - $2,999,999.99).
2002 - Mets signed Carlos Gomez as a free agent. Gomez would later be the centerpiece in the Johan Santan trade (2008).