By Tzvi Machlin Fox Sports pundit Shannon Sharpe decided to shake things up on today’s edition of Undisputed by unveiling his new “Mount Rushmore of Athletes.” During an early segment of today’s show, Sharpe and Skip Bayless debated the placement of golf star Tiger Woods on the all-time athletes list. Sharpe immediately started running down his list of the four greatest athletes of all-time. At the top of the list he has Serena Williams due to her 23 grand slam titles – the most in the open era. He then placed 23-time Olympic gold medal winner Michael Phelps due to his utter dominance in swimm…