Manning hurting after head injury

A bloodied Eli Manning was in some discomfort a day after receiving 12 stitches for a head wound.

Manning's status for the New York Giants' game against the Pittsburgh Steelers this weekend is uncertain.

While the Giants said Tuesday that Manning showed no signs of a concussion after suffering a 3-inch gash to his head in a 31-16 win over the Jets on Monday night, the 29-year-old quarterback was undergoing a battery of tests to make sure he did not suffer a more serious head injury. His helmet was knocked off and he was hit in the head.

Coach Tom Coughlin was told Tuesday morning that Manning was experiencing the normal amount of discomfort a player goes through when he has stitches.

Yo, Adrian: The Seattle Seahawks have released former Bears running back Adrian Peterson; they'd signed him last Thursday. His release clears roster room for newly acquired defensive lineman Kentwan Balmer. Seattle also released linebacker Alvin Bowen and signed kicker Clint Stitser to the 80-man training camp roster.

Zastudil's out: Kicker Dave Zastudil was placed on injured reserve by the Cleveland Browns after his surgically repaired right plant leg did not respond enough to rehab and rest for him to kick this season. Zastudil missed half of 2009 with a torn patellar tendon, which was surgically repaired during the off-season.

Titans waive Johnson: The Tennessee Titans have waived injured rookie running back Stafon Johnson, the former Southern California standout whose college career was ended by a weightlifting accident that crushed his neck. Johnson dislocated his right ankle and broke his fibula Saturday night in the Titans' 20-18 loss at Seattle. Before Tuesday's move coach Jeff Fisher had said Johnson would be out up to 12 weeks recovering from surgery.

Betts joins Saints: The New Orleans Saints made a move to strengthen their running back depth when they signed former Redskin Ladell Betts to a one-year contract Tuesday. Betts joined his new teammates for a two-hour practice at the Superdome, but didn't wear shoulder pads and was held out of team drills as he continues to work his way back from surgery last fall to repair torn left knee ligaments.

Coach Sean Payton said Betts will not play against Houston on Saturday night in the Superdome.

Nelson injured: Buffalo Bills rookie receiver David Nelson is out indefinitely after being carted off the field with a right leg injury during practice on Tuesday. Without providing any specifics of the injury, coach Chan Gailey said, "it doesn't look good." Based on the initial prognosis, Gailey added that there is a question as to whether Nelson will recover in time for the Bills' season opener against Miami on Sept. 12.