Doesn't have to be in the same time frame and if those two fighters fought whose corner do you think the trainer would wind up in ? Example (For slow posters) Manny Steward Lennox Lewis vs Wladimir Klitschko Goes with Lewis because of several reasons. Lewis is black, sticks with a fellow black man doesn't wanna look like a traitor to his own people. Sticks with Lewis because he was with Lewis before Wlad and 3 because Lewis would knock Wlad out and Manny likes to be on a winning side.
joe souza cornered leija for the gatti fight, but was gatti's cutman for a long time and was back w/ gatti in his very next fight.
Sdunek would work with Vitali, because Wlad fired him. Wlad would use a Duodenum punch on both of them. :nono:
It doesn't have to be the same time frame. It could be Eddie Futch training Holmes and Bowe and the question is whose side would he be on if they fought ?