Players On Four Teams in a Season

[LouGehrig]

Dave Martinez, Dave Kingman, and Wes Covington are among the "select" group whose members have played on four teams during the same season.

http://baseball.suite101.com/article...ms_in_a_season

[EdTarbusz]

Mike Kilkenny did it in 1972. He spent about a month with the Tigers, a week and a half with the A's, a month with the Padres and finished the season with the Indians.