Giants coach Ben McAdoo had to think on his feet when he was the quarterbacks coach for the Packers in 2013.

Aaron Rodgers missed seven games with a broken collar bone midway through the year before returning Week 17, and then for a playoff game against the 49ers in the Wild Card round.

With Rodgers out, three quarterbacks got starts in his place: Matt Flynn, Scott Tolzien and Seneca Wallace. Even Vince Young was brought in to be given a shot.

Fast forward to Sunday’s game against the 49ers. The most prominent figure on San Francisco’s sideline will be backup quarterback Jimmy Garoppolo, whom McAdoo is expecting to see when he brings the Giants to Levi’s Stadium.

“I wouldn’t be surprised by it. I would actually kind of expect it, just being an offensive coach and a guy that’s spent a lot of time in the quarterback room,” McAdoo said. “You get a guy like that, you want to get him out there, get him a few reps as soon as possible.”

49ers coach Kyle Shanahan said it’s likely rookie C.J. Beathard makes his fourth straight start despite getting sacked 14 times and hit another 38 over the last three weeks.

Garoppolo will be active, making him an injury away from being thrust into the lineup just 13 days since being acquired in the trade deadline deal from New England.

McAdoo said he expects Garoppolo to be ready based on what the fourth-year quarterback absorbed with New England.

“He’s a guy that, when you’re trained, a lot of times the best teachers are the players as far as examples go,” McAdoo said. “So he’s been, for four years, I believe, with one of the best that’s ever snapped them up. I think goes a long way. You get a chance to learn a lot by being around a guy like Tom Brady and Bill Belichick. And I think that will definitely help him in his career.”