PITTSBURGH (AP) — Pittsburgh Steelers quarterback Kenny Pickett is out indefinitely after undergoing surgery for a high right ankle sprain. Pickett had the procedure done less than 24 hours after a 24-10 loss to Arizona. Pickett was injured in the second quarter when Cardinals defensive end Jonathan Ledbetter fell on his at the end of a 2-yard scramble. Steelers coach Mike Tomlin said Mitch Trubisky will start for Pittsburgh when the Steelers host New England on Thursday.