New York Giants offensive tackle Justin Pugh sat out Friday's training session with a concussion, according to the New York Daily News.

The rookie is believed to have taken a blow to his head in Thursday's session and will now go through the NFL's protocol for recovery from concussion.

Pugh complained of headaches before training on Friday, which means that he will now be out of action for several days as he goes through the recovery process.

It is as yet unclear whether Pugh will dislodge starting right tackle David Diehl this season.