Gar-Field graduate Clint Sintim, a second-team All-Met defensive lineman in 2003 and second-round pick of the New York Giants in 2009 out of Virginia, announced his retirement Monday, ending a pro career that had hardly begun.

Clint Sintim After back-to-back knee injuries, former Virginia standout Clint Sintim is walking away from his football career. (Lisa Blumenfeld/Getty Images)

The linebacker had not appeared in a game the last two seasons because of successive knee injuries.

Sintim, 27, posted on his Facebook page: “I never actually announced it but I am officially retired from the game of football. I want to thank everyone who supported me throughout my movement but it was honestly time for me to walk away from the game. Ambition should not be limited to a sport and in my case it is not. ‘Continue to chase your dreams with the awareness of obstacles….You may not always be able to dictate your path… but your response to change is always mental!!'”

Sintim, the Giants’ highest-drafted linebacker in 29 years, as the New York Daily news pointed out, was waived by the team last summer. For his career, he played in 24 games, with one start, totaling 33 tackles and one sack (of Dallas Cowboys quarterback Tony Romo).

In his last two years at Virginia, Sintim had 19 sacks. He did not immediately return a phone message Monday afternoon.