SANTA CLARA >> In a grueling nine-hour span Monday, as NFL free agency deals got brokered and players moved addresses, eight 49ers exited a once-dominant roster.

The last two to leave — through 6 p.m. Monday, that is — are arguably the two most deflating yet anticipated departures: linebacker Dre Greenlaw and fullback Kyle Juszczyk.

Juszczyk, a source confirmed, was informed that he’ll be released, thus ending his role as the roster’s longest-tenured player. He had made the Pro Bowl every season since arriving in the 49ers’ initial free agency class under coach Kyle Shanahan and general manager John Lynch.

Earlier Monday, team after team ponied up and pounced on 49ers free agents, all while next season’s Super Bowl hosts sat mostly idle, all due respect to incoming tight end Luke Farrell.

Of the seven players to score riches elsewhere, Greenlaw’s hit differently, a symbolic parallel to his intimidating play on the field as All-Pro Fred Warner’s wingman.

Greenlaw, despite missing almost all of last season with Achilles issues, found a generous suitor in the Denver Broncos, who gave three-year deals to both Greenlaw ($35 million) and 2022 All-Pro safety Talanoa Hufanga ($45 million), according to the NFL Network.

Other 49ers starters to exit were cornerback Charvarius Ward (Indianapolis Colts; three years, $60 million) and guard Aaron Banks (Green Bay Packers; four years, $77 million). The Kansas City Chiefs, two-time Super Bowl slayers of the 49ers in recent years, poached running back Elijah Mitchell (one year, $3.5 million) and offensive tackle Jaylon Moore (two years, $30 million). Also out the 49ers’ door is backup quarterback Josh Dobbs, who’s part of the New England Patriots’ makeover.

Even more departures are expected with Wednesday’s start to the league’s fiscal year: wide receiver Deebo Samuel’s trade to Washington, and the anticipated release of defensive tackles Javon Hargrave and Maliek Collins.

The 49ers recently preached a cost-conscious recalibration, so they figured to lose more players than make big acquisitions. They did get running back Patrick Taylor Jr. and defensive tackle Kevin Givens to re-sign on one-year extensions, a source confirmed.

Their first acquisition is Farrell, a blocking specialist for the Jacksonville Jaguars who’s coming aboard on a three-year, $20.5 million deal with $11 million guaranteed, NFL Network reported. His 6-foot-5 frame had just 36 receptions for 318 yards and no touchdowns in 66 games (20 starts) for Jacksonville.

Farrell, an Ohio native, was a 2016 freshman at Ohio State alongside Nick Bosa. As they reunite, the 49ers Faithul is wondering if they’ll be joined by Joey Bosa, who has been on the market since being released Thursday by the Los Angeles Chargers.

But Monday, like last season, was about mourning the losses. George Kittle reacted to Juzczyk’s release with a post on X with two emojis: a broken heart and a juice box. The brokenheart emoji also was used by cornerback Deommodore Lenoir, from a morning Instagram tribute to Hufanga and then a farewell note to Greenlaw that read in part: “Ouch man (broken heart emoji) taking all my soldiers.”

Ward vowed to leave the 49ers and the Bay Area for understandable personal reasons after three seasons, the last of which was marred by the unexpected death of his 23-month-old daughter.

Hufanga, a 2021 sixth-round pick, made All-Pro and the Pro Bowl in 2022, but knee and wrist injuries shelved him 17 games the past two seasons. Malik Mustapha and Ji’Ayir Brown are poised to serve as the 49ers’ starting tandem.

Banks, an Alameda native and El Cerrito High product, never made a Pro Bowl in his four seasons, but he matured into a top-tier guard next to Trent Williams. Moore made 12 starts in four years as the 49ers’ swing tackle. Mitchell led the 49ers in rushing in 2021 before injuries derailed his career and cost him all of last season.

“So happy for guys getting paid what they deserve, but losing awesome people in the locker room is always the worst part of every offseason,” 49ers long snapper Taybor Pepper posted on the social media platform X.

The majority of deals cannot become official until the new league year begins Wednesday at 1 p.m., unless it involves a player who is re-signing with a team or has been released prior to free agency. That is also when trades can become official, including Deebo Samuel’s from the 49ers to the Washington Commanders for a fifth-round pick.

The 49ers’ NFC West rivals also made waves: the Seattle Seahawks lured former 49ers backup Sam Darnold as Geno Smith’s replacement on a three-year, $100 million deal; the Arizona Cardinals landed ex-Eagles defensive end Josh Sweat (four years, $76 million); and the Los Angeles Rams added wide receiver Davante Adams (two years, $46 million) as well as defensive tackle Poona Ford (three years, $30 million).

OFFENSIVE LINE CHANGES >> The 49ers will need a new left guard and swing tackle. As Banks exits to protect Jordan Love in Green Bay, the 49ers braced themselves for his exit by re-signing Ben Bartch ahead of free agency.

Moore’s fourth and final season with the 49ers served as a fruitful springboard into free agency. Moore has spent most of his career as a fill-in starter for left tackle Trent Williams, who missed the final seven games last season but is expected to return next season.

With Moore and Williams on injured reserve, the 49ers’ left tackle for their season finale was Charlie Heck, a rushed-in addition who is now a free agent.

MITCHELL’S FAREWELL >> Elijah Mitchell led the 49ers with 963 yards his rookie year as a 2021 sixth-round draft pick. Then injuries derailed his tenure, costing him 18 games from 2022-23 and all of last season; a hamstring injury in the preseason sent him onto injury reserve.

The 49ers have yet to announce whether Mason, Christian McCaffrey’s top backup, will draw a $5.3 million tender as a restricted free agent.

QUARTERBACK CAROUSEL >> Sam Darnold is returning to the NFC West, having raised his stock as the Minnesota Vikings’ starter last season after serving 2023 as Brock Purdy’s backup on the 49ers. Darnold’s deal is for three years and $100 million ($55 million guaranteed), according to ESPN’s Schefter.

While Purdy continues to wait for a record contract extension, the 49ers must fill out the depth chart. With Brandon Allen set to become an unrestricted free agent, former journeyman Jameis Winston is in discussions with the 49ers, as well as the Chargers and the Giants, according to reporter Josina Anderson.

Monday’s moves included other quarterbacks who played under coach Kyle Shanahan:

Jimmy Garoppolo, the 49ers’ quarterback from 2017-2022, has agreed to a one-year deal to remain in a backup role with the Los Angeles Rams, who recently gave a raise to retain Matthew Stafford as their starter. Nick Mullens, one of Garoppolo’s predecessors on the 49ers, is signing with the Jacksonville Jaguars (two years, $6.5 million, per NFL Network) to replace former 49ers teammate C.J. Beathard as Trevor Lawrence’s backup.