ORCHARD PARK, N.Y. (AP) – The Pittsburgh Steelers’ top pass-rushing threat T.J. Watt had arthroscopic knee surgery, which is expected to further delay his return while being sidelined by a pectoral injury. Coach Mike Tomlin provided few other details following a 38-3 loss at the Buffalo Bills on Sunday in confirming a report first published by ESPN.com a day earlier. Watt was the NFL’s Defensive Player of the Year last season, and has been sidelined since getting hurt during a season-opening 23-20 overtime win over the Cincinnati Bengals.