Giants cornerback Prince Amukamara has been ruled out of Sunday night’s game vs. New York Giants cornerback Prince Amukamara left Sunday's season-opening game in the second quarter with a concussion and did not return. Already thin in the secondary, the New York Giants lost starting cornerback Prince Amukamara to a concussion in the second quarter of their regular-season opener against the Dallas Cowboys on Sunday night. The Giants offered no update on Amukamara's status after the game. With Amukamara out, Aaron Ross took over as the outside cornerback opposite Corey Webster. the Cowboys with a concussion, the club said via its Twitter account. His status for next week's home game against Denver is, due to the nature of concussions and the league's policy for dealing with them, far from determined.