By Wilton Jackson San Francisco is reportedly seeking to find an additional backup quarterback to Jimmy Garoppolo. With Trey Lance sidelined for the remainder of the 2022 season with an ankle injury, the 49ers are reportedly seeking an additional backup quarterback to Jimmy Garoppolo, according to NFL Network’s Mike Garafolo. San Francisco held workouts with quarterbacks Kurt Benkert, AJ McCarron, Garrett Gilbert, Kevin Hogan and Mike Glennon on Tuesday. Currently, Brock Purdy is listed as the backup quarterback to Garoppolo. Lance, who was the starting quarterback entering the season, underwe…