Tessie, originally a broadway tune written in the early 1900s, became the fight song of the Boston Red Sox. It was modernized by the Dropkick Murphys, it can be heard in the movie Fever Pitch and video game MVP Baseball 2005. 

According to the liner notes from the album in which 'Tessie' was released on, The Dropkick Murphys had this to say about the song..."We recorded this song in June 2004 and after giving it to the Red Sox told anyone that would listen that this song would guarantee a World Series victory. Obviously no one listened to us or took us seriously. We were three outs away from elimination in game 4 at the hands of the Yankees and receiving death threats from friends, family, & strangers telling us to stay away from the Red Sox and any other Boston sports team and get out of town. Luckily for us things turned around for the Red Sox and the rest is history." The Dropkick Murphys also, fittingly, performed the National Anthem before last nights Game 6 clinching win at Fenway Park, the first in 95 years!