Justin Tuck says 

"I am not me," said Tuck, who also used stronger language to describe his play. "I am not a very good player right now. It's frustrating because I do look at myself on film and I don't like what I see, and it's not the effort. I feel like I am putting forth the effort. It's some things not allowing me to play my style of football."

Justin is a player we need performing at an above average level but injuries are slowing him down

More at 

http://www.nfl.com/news/story/09000d5d82437b0e/article/giants-tuck-disgusted-with-play-since-return-from-injury?module=HP11_headline_stack