Defensive line
Adding another defensive lineman in the draft seems like overkill at first glance. The 49ers had the best defensive front in the league last year, but they could be losing two key members of that line with Arik Armstead and Ronald Blair set to hit free agency. Armstead and his versatility will command a significant raise in 2020, but Blair is coming off an ACL tear and may come at something of a discount for a productive rotational defensive end.
Even if both players return though, tacking on additional depth on the line couldn’t hurt. San Francisco was at its best rushing the passer when they had several bodies to cycle through and get after the quarterback in all four quarters. Grabbing an interior lineman to compete for snaps and shore up their run defense makes sense as well. It may not be worth a Day 1 or early Day 2 pick, but using a mid-round pick on a lineman would probably be wise for the 49ers.