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Final 2018 stock report for the 49ers cornerbacks

The 49ers 2018 season is a wrap, so let’s assess who improved and who hurt their stock this season.

NFL: Denver Broncos at San Francisco 49ers Stan Szeto-USA TODAY Sports

The San Francisco 49ers are officially into the offseason following a 2018 season that did not meet expectations. The team entered with hopes of contending for a playoff appearance, but stumbled to a 4-12 record after losing quarterback Jimmy Garoppolo to a torn ACL in Week 3.

Expectations will climb again in 2019, but before we get into that, it’s time to take a look back at the season that was for the current roster. There will be turnover in the coming months, but let’s start the offseason with a stock report on the 49ers roster. We’ll go through each position group and offer stock up or stock down for each player, and then stock up or stock down for the position group as a whole. Today we move on to the cornerbacks.

Richard Sherman: Stock up

2018 was Sherman’s first season without an interception. The lack of turnovers isn’t indicative of the veteran cornerback’s performance this season though, who was his typical lock-down self on the left side of the 49ers’ defense. Sherman totaled 37 tackles, three tackles for loss, one sack and four pass breakups in 2018. He allowed just 0.72 yards per coverage snap per Pro Football Focus, the fifth-lowest total among qualifying cornerbacks. Sherman’s play on the field and presence in the locker room has been worth every penny of his three-year, $39-million contract so far. Sherman offers the 49ers stability on an otherwise rotating secondary of young, inexperienced players.

Ahkello Witherspoon: Stock down

Witherspoon’s encouraging finish last season didn’t carry over to 2018. The second-year starter struggled with the added attention opposite Sherman, giving up six touchdowns in his first six games. His 44.9 grade from Pro Football Focus ranked Witherspoon 116th among all NFL cornerbacks. After a couple games on the bench, Witherspoon returned to action but suffered a season-ending knee sprain against the Seahawks in Week 15. He’ll go into the 49ers’ offseason program in competition for a starting role with rookie Tarvarius Moore.

K’Waun Williams: Stock slightly down

Williams was reliable in 2018, if nothing else. He started 11 games throughout the season and played in 14. The 49ers’ nickel cornerback totaled 45 tackles, 3 tackles for loss and two pass breakups this season. Williams merited a 66.7 “Above Average” grade from PFF, only good for 59th among qualifying cornerbacks. D.J. Reed is the only reason Williams’ stock is down at all. The rookie replaced Williams in Weeks 14 and 15, performed well, and seems primed to compete with the veteran for the starting role in 2019.

D.J. Reed Jr.: Stock up

Reed spent time at both nickel cornerback and free safety throughout the season. His best game came at nickel though, racking up a team-high 12 tackles, three tackles for loss and a sack against the Denver Broncos in Week 14. Despite only starting two games, Reed still managed 41 total tackles, three tackles for loss, one sack, one quarterback hit and a forced fumble. The 49ers’ fifth-round pick in 2018 showed a valuable versatility throughout the season and the ability to challenge Williams for the starting nickel role in 2019.

Tarvarius Moore: Stock up

Witherspoon’s knee injury against the Seahawks gave Moore a short audition to close out the season. The 49ers’ third-round rookie held his own when on the field, totaling 23 tackles, two pass breakups and a forced fumble against the Chicago Bears in Week 16. Shanahan praised Moore after the season, making it known that he’d be in completion with Witherspoon for the starting role opposite Sherman in 2019.

Greg Mabin: Stock unchanged

Mabin made the 49ers’ 53-man roster to start the season and spent the first eight weeks on the active roster. He was waived in Week 9 and after a short stint on the practice squad, Mabin returned to the 49ers’ roster in Week 10. He worked his way into the cornerback rotation early in the season but only managed 16 tackles, one pass breakup and a forced fumble. Mabin played on a one-year contract and is an exclusive rights free agent this offseason.

Emmanuel Moseley: Stock up

Moseley was promoted to the 53-man roster before the 49ers’ Week 9 win over the Oakland Raiders. He dislocated his shoulder early in the game and required season-ending surgery. Prior to his promotion, Moseley was the 49ers’ highest-paid player on the practice squad, indicating he’d received interest from other teams. Moseley, signed as an undrafted free agent in 2018, is contracted through the next season, and will have an opportunity to complete for a more prominent role in 2019.

Overall: Stock slightly down

The left side of the 49ers’ defense is set with Sherman in 2019. Williams and Reed, if he isn’t pulled in the safety scene, should be in competition for the starting nickel cornerback spot. The weakness resides opposite Sherman at right cornerback, where Witherspoon and Moore will battle for the starting spot in the offseason. Neither has proven capable of handling the role, and the 49ers may add more competition through free agency or the draft.