The Revolution fell for the fifth time in five MLS Cup appearances over a 13-year span. Three of those losses were to the LA Galaxy (all in extra time), who also defeated the Revolution, 2-1, in extra time in the 2001 U.S. Open Cup final.
Goals: Zardes, Keane; Tierney.
https://www.boston.com/sports/untagged/2014/12/07/revolution-players-defensive-miscue-led-to-loss