Jose Canseco Claims Alex Rodriguez Cheated on Jennifer Lopez In a new Tweet storm, Canseco says A-Rod fooled around behind <br />J. Lo's back with <br />his ex-wife, <br />Jessica Canseco. Jose Canseco, via Twitter The accusations come just a day <br />after Rodriguez and Lopez <br />announced they were engaged. According to Canseco, A-Rod contacted<br />Jessica just a few months ago. Canseco went on to say he'd take <br />a polygraph to prove he's telling the truth and even challenged <br />Rodriguez to a fight. Jose Canseco, via Twitter
