If cornerback Tommie Campbell is going to wrestle away a starting position in training camp he’s going to have to be more aggressive. Campbell allowed a few completions on his side of the field on Thursday when he came off the bench to replace starter Alterraun Verner. Coach Mike Munchak said the Titans haven’t decided which player might line up as a starter against the Bengals next week opposite starter Jason McCourty. “I think he was a little tentative’’ Munchak said of Campbell. “For Tommie I think when he watches (tape) he’ll probably say “I could’ve done this or I could’ve done that.” But I think as the game wore on he started playing better and better.”