EAST RUTHERFORD - In true Tom Coughlin fashion, he started Tuesday's news conference five minutes early.

With one year left on his contract, Coughlin resigned his post as Giants head coach. In 12 years, the 69-year-old delivered two Super Bowls and was the third-longed tenured coach in the league.

Coughlin says his success is defined by relationships with players and fostering a "team culture."

"We have an obligation to teach these young men the lessons, the principles and the life skills they will need once their pro careers are over," he said. "Values like honesty, trust, responsibility, respect, service and integrity."

Owner John Mara declined to answer hypothetical scenarios regarding Coughlin's job status had he not resigned. He did say that "it's just time."

The Giants have offered Coughlin a job with the team, although that role is not clear.