One week after he left the practice field on a cart with an air cast on his lower leg and tears in his eyes, Tracy was back practicing Tuesday for the Giants.

Within a few hours of the injury, worst-case scenarios had been ruled out after a hospital visit, and the rookie running back was back in team meetings preparing for his next opportunity.

Call it the most improbably fast recovery since Celtics star Paul Pierce missed just a few minutes in Game 1 of the 2008 NBA Finals, after leaving the court in a wheelchair.

“A lot of the folks around the building started calling me ‘Paul Pierce,’ ” Tracy quipped. “They said I pulled a ‘Paul Pierce.’ But it’s all good. I know there is very genuine love around the building, and I’m happy to be here.”