SANTA CLARA — Jimmy Garoppolo wasn’t able to work with 49ers coaches much during the end of the regular season while he was rehabbing from a torn ACL, so he took advantage of another resource: Mike Shanahan.

Once Garoppolo was back in the building and working with the medical and training staffs, coach Kyle Shanahan and then-49ers quarterbacks coach Rich Scangarello were busy game-planning with C.J. Beathard and Nick Mullens. Garoppolo had to find other ways to work on his game.

“There’s a number of things,” Garoppolo said. “Whether it’s film room or getting with the coaches. It was tough during the season because they were busy game-planning and stuff like that.

“It’s been a very productive offseason. Whether it was in the film room or out on the field. Even trying new things. Different drops, how your movement is. It’s been a very productive offseason.”

The younger Shanahan wanted Garoppolo to get some classroom work in, so he enlisted someone he trusts. He brought in his father, who is a two-time Super Bowl winning coach.

Garoppolo described what they did during their weeks together in December.

“A lot of different things,” Garoppolo said. “He’s one of the best to ever to do it, obviously. A Hall of Fame guy. He’s just incredibly smart. Seeing the game from his point of view is different. He was looking at it differently than a quarterback. It’s hard to describe. It’s going to help me a lot going forward.”

Garoppolo explained that they didn’t just watch his own film, they broke down a variety of game clips from both sides of the ball.

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“Literally, everything,” Garoppolo said. “We watched our offense, our defense, other teams, teams that played two years ago that he thought a clip could help me. It’s applicable in different ways. He’s so smart that it was incredible to have that experience and I thank him a lot for that.”

Kyle believes it was beneficial for both parties. Garoppolo had the chance to take advantage of a new resource and his father was able to do one of the things he really enjoys: talk about football.