Boston Red Sox relief pitcher Matt Barnes Paul Rutherford-USA TODAY Sports

The Boston Red Sox are officially closing the book on an era.

Chris Cotillo of MassLive reports Tuesday that the Red Sox have designated veteran reliever Matt Barnes for assignment. Cotillo describes the decision as “shocking” but notes that the team needed to open up a spot on the 40-man roster for newly-signed outfielder Adam Duvall.

The 32-year-old Barnes had been a staple in the Red Sox bullpen over the last nine seasons and was expected to retain a big role in 2023. He made 10 appearances for Boston during their 2018 World Series-winning campaign (giving up just one earned run) and also made the All-Star team in 2021. While Barnes struggled a bit in 2022 (with a 4.31 ERA in 41 games), he battled a shoulder injury for much of the year.

For the Red Sox, who will now have seven days to release, trade or waive Barnes, it has been an offseason of widespread changes. They lost Xander Bogaerts, Nathan Eovaldi, JD Martinez and Rich Hill in free agency while also designating Eric Hosmer for assignment. Though there have been some notable adds (signings of Justin Turner, Chris Martin and Corey Kluber, plus a trade for Adalberto Mondesi), Red Sox fans are not happy and recently let management hear it.

More must-reads:

TODAY'S BEST
Timberwolves chew up Nuggets to force Game 7
Rangers secure spot in conference finals after stunning third-period comeback over Hurricanes
Xander Schauffele makes history in first round of PGA Championship
Yankees' Hal Steinbrenner shares massive Juan Soto contract update
Steelers' Cameron Heyward addresses contract holdout
Knicks star ruled out for potential closeout game
Dodgers starter undergoes season-ending UCL surgery
Clemson’s Dabo Swinney gives smug response about not using transfer portal
Caitlin Clark's debut was most-watched WNBA game in more than 20 years
Watch: Chris Kreider's natural third-period hat trick shatters Hurricanes' comeback hopes
Veteran NFL safety will either play for this team or retire in 2024
Former Red Wings head coach linked to open NHL job
How Patriots' Drake Maye has already impressed Jacoby Brissett
LeBron James, Giannis Antetokounmpo, Stephen Curry among Forbes' highest-paid athletes for 2024
Steve Cohen addresses if Mets could again be trade-deadline sellers
Tiger Woods ruins strong first round with sloppy finish at PGA Championship
NFL responds to speculation about Chiefs schedule and Taylor Swift
Despite hopes for change, NASCAR championship weekend will return to Phoenix in 2025
Chiefs will achieve something not done since 1927 with 2024 schedule
Yankees' Aaron Judge comments on resurgence after bad slump