Andy Pettitte returned to Yankees camp as a guest instructor on Tuesday, throwing batting practice and working exclusively with Greg Bird. The 44-year-old Pettitte threw to the 24-year-old Bird on a back field in Tampa to give the first baseman more practice hitting left-handed pitching. Pettitte, after all, is one of the greatest lefties of all-time as he won 256 games in 18 seasons. “He wanted to work on two-seamers, running balls in, cutters, so I actually was throwing him all my pitches,” Pettitte told the