"I feel like I could have played this week, next week, the week after," Griffin said after the game, via The Associated Press. "But that's not my decision."
"I worked the whole week like I was going to play," said Griffin, who practiced but didn't take first-team reps leading into the game.
Instead, Shanahan started Cousins, who threw for 329 yards and two touchdowns in his first NFL start. Griffin said he "couldn't be any more happy for this team or for Kirk" after the win.
"I talked to him about being cool, calm and collected and not to freak out," Griffin said, via The AP. "He did a good job of staying poised and staying confident in there."