George Kittle and Buckner appeared to be staples on both sides of the field, with a massive extension looming for the captains. Then, Nick Bosa happened, becoming the face of the most feared defense in the league in 2019.
Fast forward a year later, and Buckner is shipped to the Colts, becoming the second-highest-paid defensive lineman behind Aaron Donald. What does that mean for our defense? Should John Lynch draft Buckner's replacement early in the draft? He should not, considering the lack of depth at secondary and wide receiver. More importantly, drafting a defensive lineman early (again) would be a mistake due to two studs already on the roster--Ronald Blair III and D.J. Jones.
Ronald Blair just re-signed with the team to a one-year deal, and general manager John Lynch expressed Blair's high value to the defense line.
"Ronnie is a great teammate, who has developed into a key contributor to our defense. His versatility and playmaking ability along with his strength of character off the field make him special. Ronnie's work ethic makes us confident he will return to form this season."
- John Lynch
Blair recorded 8.5 sacks over the past two years before tearing his ACL on Monday Night Football against Seattle during one of the most athletic sacks of the year on the ever so slippery Russell Wilson.
D.J. Jones will likely be the immediate replacement for Buckner for his ability to line up in front of the center. Those watching the Niners regularly noticed that Jones was a key piece on defense. The former 6th rounder was becoming a centerpiece of the defensive line rotation, racking up 19 solo tackles with 4 of them for losses. His season was also cut short after suffering a high ankle sprain in the famed shootout with New Orleans in Week 14.
What made the 49ers defense so scary to opposing offenses was their depth. Defensive coordinator Robert Saleh and D-Line coach Kris Kocurek could spell Buckner, Armstead, Bosa, and Ford with the versatility of D.J. and Ronald. With Blair and Jones sidelined late last season, the 49ers lacked depth and turned to Solomon Thomas, Sheldon Day, and Earl Mitchell to produce in that top-heavy rotation. Both Jones and Blair were deeply missed in Super Bowl 54 when the defense needed all the pressure in the world to slow down Patrick Mahomes and the Chiefs.
Buckner was the epitome of reliability. The big man suited up for all but one game in 4 seasons and played the most snaps out of any SF defensive lineman in 2019. DeForest is irreplaceable--but if there's a D-line room that has the depth and resolve to step up, it would be Kris Kocurek's.
There's no doubt that Robert Saleh will need to rely on Blair and Jones for production with Buckner and Sheldon Day now in Indy. Anything from Solly, Jullian Taylor, and Kentavius Street would be added bonuses.
Assuming they stay healthy, the explosiveness Blair and Jones have shown should give Niner fans confidence that the best defensive line in 2020 will still reside in Santa Clara.
Oh, and they get buckets too.
Written By:
Vallejo native, San Francisco sports fanatic, and unprofessional chicken wing eater.
All articles by Michael Cataldo
@MikeJCataldo
YouTube Channel
Michael Cataldo
Vallejo native, San Francisco sports fanatic, and unprofessional chicken wing eater.
All articles by Michael Cataldo
More San Francisco 49ers News
-
49ers preseason schedule: Dates, times, and TV info for all three games
The NFL announced the dates and kickoff times for every preseason game on Wednesday, completing the San Francisco 49ers' 2026 exhibition schedule. The only remaining unknown was the kickoff time for the 49ers' preseason opener against the Tennessee Titans at Levi's Stadium on... -
49ers urged to counter Myles Garrett trade with blockbuster move of their own
The NFC West landscape shifted dramatically this week when the Los Angeles Rams acquired star pass rusher Myles Garrett, creating another obstacle in the San Francisco 49ers' pursuit of a division title. In response to the move, Bleacher Report's Alex Kay proposed a... -
49ers WR Brandon Aiyuk facing arrest warrant after viral video
According to the New York Post's Edward Lewis, an arrest warrant has been issued for San Francisco 49ers wide receiver Brandon Aiyuk, who is wanted on a misdemeanor charge of exhibition of speed. Aiyuk made headlines in December 2025 after posting a widely criticized video... -
Should the 49ers be worried about a potential Aaron Donald comeback?
As if having to face Myles Garrett twice a season wasn't concerning enough for the San Francisco 49ers, the latest Los Angeles Rams rumor could make life even more difficult. NFL insider Jordan Schultz recently reached out to former Rams defensive tackle Aaron Donald to gauge...