San Francisco Giants catcher Joey Bart (back) will undergo a scan on his back before Sunday's game against the New York Yankees. According to Giants manager Gabe Kapler, Bart picked up the injury during Saturday's batting practice. The former first-round pick was unavailable off the bench for Saturday's game. It's unclear how long Bart will be out, and the 26-year-old is considered day-to-day. Roberto Perez started in Bart's place on Saturday and would draw another start if Bart cannot go ...