1: one who has personal enmity for another2 a: an enemy in war b: adversary, opponent3: one who opposes on principle <a foe of needless expenditures>4: something prejudicial or...
Mav's foe is referring to the foe or enemy of the Mavericks (basketball or hockey depending on which Maverick's team you are referring to) , which could be :
Cavs
Columbia Basin Riverhawks
or the...