Frank Mir cleaning up his boxing for Todd Duffee bout

Frank Mir is getting ready for his heavyweight main event bout against Todd Duffee and it looks like the biggest focus in his prep has been on working his boxing fundamentals, something he says Todd Duffee just not good at.

Frank Mir faces Todd Duffee in the main event of UFC Fight Night San Diego, on July 15th at the Valley View Casino Center in San Diego California.