KANSAS CITY, Mo. (AP) – Chiefs quarterback Matt Cassel has had surgery on his injured throwing hand and coach Todd Haley still hopes that he will be back this season. Cassel hurt his right hand in Sunday’s 17-10 loss to Denver. The former Pro Bowl quarterback had surgery Monday evening to repair what Haley called a “significant” injury. Haley said Wednesday he doesn’t know when Cassel will be able to return. The team has not placed him on injured reserve, which means he could return this season. Haley said much of that will depend on how Cassel recovers this week. The Chiefs play Monday night at New England, giving backup Tyler Palko a little more time to prepare. Rookie Ricky Stanzi will be the backup.