Former MLB pitcher Mike Bacsik is quickly backtracking from an offensive tweet he wrote during Sunday night’s Mavericks vs. Spurs game. Mav’s forward Eduardo Najera was ejected for a flagrant foul against Spurs guard Manu Ginobili in the fourth quarter. Bacsik, a Mav’s fan, was tweeted: “Congrats to all the dirty mexicans in San Antonio,”. [...]