While the Giants said Tuesday that Manning showed no signs of a concussion after suffering a three-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 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.
"He did not talk too much about pain, but I don't have a lot of information because any time you have an injury that is a head injury they are going to do all kinds of tests," Coughlin said. "They are in the process of doing that right now."
Coughlin refused to speculate whether Manning will play Saturday night in the Giants' preseason home opener at the New Meadowlands Stadium.
"We'll wait and hear what the doctors have to say after all their examinations are concluded," Coughlin said.
Manning was having the tests at the Hospital for Special Surgery in New York City on Tuesday. Coughlin did not know the exact nature of the tests.
"He is going to go through the battery of tests that any player has who experiences any kind of a head injury," Coughlin said. "They are not going to leave a stone unturned."
Manning was expected to rejoin the Giants at training camp in Albany, N.Y., on Tuesday night.
Even if Manning is cleared to play, there is some concern his helmet could rub against the stitches and create a problem with the wound healing.
"Our medical people will make all of those decisions and the health and well-being will be first and foremost in terms of the decision to be made," Coughlin said. "There is great deal of attention placed in this area (head injuries)."
Manning was hurt with 10:45 left in the second quarter when he opted to throw a pass on a run call without telling the rest of the offense.
Expecting a handoff, big Brandon Jacobs ran into Manning with his shoulder as the quarterback pulled the ball away. The collision knocked the ball loose and pushed Manning's chin strap off his jaw.
Then Jets linebacker Calvin Pace hit Manning in the middle of his back, knocking off his helmet and pushing Manning face first forward.