Garoppolo, whom the 49ers traded for during the 2017 season, found success early in his tenure in San Francisco. The 49ers finished the season on a five-game winning streak after starting the season 1-10. Garoppolo suffered a season-ending injury in Week 3 of the 2018 season, but he posted a 64.8 percent completion percentage, 2,278 yards, 12 touchdowns, eight interceptions and a 94.1 quarterback rating in his nine games before the injury.
After Garoppolo's injury, Scangarello helped Mullens advance from undrafted free agent and practice squad player to NFL starts. Mullens completed 64.2 percent of his passes for 2,277 yards, 13 touchdowns and 10 interceptions in his eight games in 201
In 2019, Garoppolo, Beathard and Mullens combine to pass the most passing yards in a season since Steve Young threw for 4,510 yards in 1998.  Scangarello holds four seasons of NFL experience – he served as an offensive quality control coach for Atlanta (2015) and Oakland (2009) – and coached for 17 years at the collegiate level.
He previously served as an offensive coordinator at Wagner College, Northern Arizona, Millsaps and UC Davis.
He has 24 total years of coaching experience.