The retirement of defensive end Justin Smith this week did more than weaken the San Francisco 49ers, both on the field and in the locker room. It also severed a line that went back to the first Clinton Administration.
The last time that neither Smith nor Bryant Young was a mainstay on the Niners' defensive line? Try 1993. That the Niners have won one Super Bowl since then matters little for this discussion.
So with the Niners concluding their first session of organized team activities Thursday, there is no doubt a different feel among the defensive linemen, let alone the entire team with a rookie coach in Jim Tomsula.
After Thursday, the Niners, who now have a full 90-man roster, have OTAs May 27-29, June 1-2 and June 4-5, with a three-day mandatory minicamp June 9-11.
The following is an updated look at the 49ers' offseason thus far, a spell that earned them a D-plus grade from ESPN.com NFL Insider Mike Sando, the lowest grade in the NFL:
RB Jarryd Hayne -- Australian rugby star chose the Niners, who he said gave him $100,000 guaranteed on a futures/reserve contract, over the Detroit Lions and Seattle Seahawks to begin his American football adventure and plans to play running back and special teams ... if he makes the squad.
WR Jerome Simpson -- Acrobatic wideout known for his forward somersault TD for Cincinnati and his legal issues signed to two-year deal.
WR Torrey Smith -- Five-year, $40 million contract with $22 million guaranteed brings big and fast deep threat who could be the yin to Anquan Boldin's yang ... like they were in Baltimore when the Ravens beat the Niners in Super Bowl XLVII.
RB Reggie Bush -- No. 2 pick of 2006 draft signs one-year contract to return to California as the San Diego native and USC product will be part of a three-headed Niners rushing attack, along with Carlos Hyde and Kendall Hunter.
OL Erik Pears -- Eight-year NFL veteran who spent past five years with Buffalo Bills signs two-year deal, $4.7 million contract to compete for left guard spot (Pro Football Focus gave him a -25.0 grade last season, 76th of 78 guards) and/or provide depth at right tackle.
LB Nick Bellore -- Special teams ace who led New York Jets in special teams tackles in three of the past four years as an undrafted free agent out of Central Michigan. Has played in all 64 games since entering the league in 2011, though has yet to start one.
LG Mike Iupati -- Three time Pro Bowler moves to Arizona on five-year, $40 million deal with $22.5 million guaranteed to form a formidable left side of offensive line for Cardinals with left tackle Jared Veldheer.
LB Patrick Willis -- Spiritual leader retires at age 30 after eight seasons, seven Pro Bowls and five All-Pro selections due to sore feet and a desire to move on.
FS Bubba Ventrone -- Retired to take job as assistant special teams coach with Super Bowl champion New England Patriots.
WR Stevie Johnson -- Released in cost-cutting move, signed three-year, $10.5 million deal with San Diego Chargers.
CB Chris Culliver -- Took his career-high four interceptions from 2014 and legal issues to Washington with a four-year deal worth up to $32 million.
LB Chris Borland -- Stunned Niners and NFL by announcing his retirement after one standout season, citing potential future health concerns.
CB Corey Fuller -- Waived after being signed to practice squad last December and being active for one game, though he did not play in the season finale.
QB Josh Johnson -- Despite having a skill set more closely resembling starter Colin Kaepernick's than that of Blaine Gabbert, Johnson was allowed to leave Santa Clara as he signed a one-year deal with the Cincinnati Bengals. Johnson spent the 2013 season with the Bengals.
WR Trindon Holliday -- Released by Niners.
G Fouimalo Fonoti -- Waived by Niners.
WR Lance Lewis -- Waived by Niners.
LB Chase Thomas -- Waived /injured by Niners.
DL Justin Smith -- If he could not play at the level he was accustomed to playing, it was time to move on. So he joined Willis and Borland in retirement.
QB Blaine Gabbert -- Lone Niners QB to throw a fourth-quarter TD last season agrees to two-year, $2 million deal to return as Colin Kaepernick's backup.
TE Garrett Celek -- Signed to a one-year deal.
LS Kyle Nelson -- Signed to four-year deal.
TE Derek Carrier -- Signed a two-year extension.
CB Chris Cook -- Re-signed to a one-year deal.
LB Desmond Bishop -- Became more appealing to the Niners with only three inside linebackers with NFL experience under contract after retirements of Willis and Borland. Bishop purportedly beat out the likes of Lance Briggs and Erin Henderson and signed a one-year deal to return to Niners.
DL Arik Armstead (Oregon)
S Jaquiski Tartt (Samford)
OLB Eli Harold (Virginia)
TE Blake Bell (Oklahoma)
RB Mike Davis (South Carolina)
WR DeAndre Smelter (Georgia Tech)
P Bradley Pinion (Clemson)
OL Ian Silberman (Boston College)
T Trent Brown (Florida)
TE Busta Anderson (South Carolina)
Undrafted free agents
QB Dylan Thompson (South Carolina)
WR Dres Anderson (Utah)
WR Issac Blakeney (Duke)
WR DiAndre Campbell (Washington)
WR Darius Davis (Henderson State)
WR DeAndrew White (Alabama)
OL Patrick Miller (Auburn)
DL Marcus Rush (Michigan State)
S Jermaine Whitehead (Auburn)
CB Mylan Hicks (Michigan State)
OL Justin Renfrow (Miami)