49ers roster analysis: Work needed to keep up defensive line dominance

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This is the sixth installment of a nine-part series that examines the 49ers’ roster coming out of the 2019 season, looks ahead to 2020, and outlines the offseason challenges facing general manager John Lynch and coach Kyle Shanahan on a position-by-position basis.

We continue with a look at the 49ers’ defensive line.

Under contract (signed through)

-Dee Ford (2023)
-DeForest Buckner (2020)
-Nick Bosa (2022)
-Solomon Thomas (2020)
-D.J. Jones (2020)
-Jullian Taylor (2021)
-Kentavius Street (2021)
-Kevin Givens (2021)
-Willie Henry (2020)
-Ray Smith (2021)
-Alex Barrett (2021)
-Jonathan Kongbo (2022)

Buckner is scheduled to play on the fifth-year option of $14.36 million, but the 49ers would like to work out a multi-year contract extension for him and likely see his cap number come down this year.

Ford’s $13.65 million salary for the 2020 season becomes fully guaranteed on April 1. Ford signed the lucrative deal a year ago after coming from the Kansas City Chiefs in a trade for a second-round draft pick.

Thomas is scheduled to enter the fourth and final year of his rookie contract. The 49ers will not pick up the fifth-year option for 2021, but it is not out of the question he could return beyond this season on a significantly reduced contract.

Expiring contracts

-Arik Armstead (UFA)
-Ronald Blair (UFA)
-Sheldon Day (UFA)
-Damontre Moore (UFA)
-Anthony Zettel (UFA)
-Earl Mitchell (UFA)

The 49ers could use the franchise tag on Armstead, but that would require the team committing more than $19 million to him for the 2020 season. The 49ers prefer to re-sign Armstead to a multi-year extension for a lower annual average.

What needs to happen

The 49ers had tremendous depth along the defensive line, but it never seems to be enough at this position. That is why the 49ers will always be looking for more players at this spot. The 49ers could use another outside pass rusher capable of six sacks on the season.

Armstead will cost the most to retain among all the 49ers’ free agents. How high are they willing to go? Lynch made it sound as if the team is focused on a long-term contract, rather than the fallback of merely placing the franchise tag on him.

It might be even a greater priority to work out a long-term extension with Buckner, who enters the final year of his contract. All you need to know about how Buckner is viewed inside the organization became evident when the coaching staff voted him as the winner of the Bill Walsh Award.

Blair and Day are scheduled for unrestricted free agency. Blair served an important role as a backup nickel pass-rusher. His absence after he sustained a torn ACL in the middle of the season was felt. Blair could have taken some of the pass-rush snaps to enable others on the defensive line to remain fresh.

Day could be a starter somewhere else. But when Jones slated to start again this season at nose tackle, the 49ers are not likely to pay much to retain him as a backup.

[RELATED: Why 49ers' O-Line is in good shape for immediate future]

Expectations

The 49ers defensive line was dominant last season. It was San Francisco's strength, and they need to be even more dominant this season.

Bosa quickly established himself as a star. Buckner is another star. Ford has to take the necessary steps in the offseason to make sure the 49ers do not lose him for long stretches of time next season.

Armstead gives the 49ers exactly what they need. He’s a base defensive end who moves inside to rush the passer in nickel situations. If he returns, the 49ers should have the best collection of defensive linemen in the league. If Armstead is not back, the 49ers must add a lower-cost option who fits the scheme and minimizes the drop-off.

Thomas will be back for his fourth season with the 49ers, and there is no reason why he can't produce significantly more in 2020 as a rotational player.

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