The 49ers last week conducted a workout with Oregon offensive tackle Tyrell Crosby, one of several offensive linemen they are looking into in the run-up in the draft.
According to Pro Football Focus, Crosby didn't allow a sack or even a quarterback hurry while playing left tackle for the Ducks in 2017. Some teams see the 6-5, 325-pound Crosby as a right tackle in the NFL, other teams reportedly are looking at him as a guard.
The 49ers have needs at a number of spots on the offensive line. Their starting right tackle, Trent Brown, is recovering from shoulder surgery and is not signed beyond the 2018 season.