Under the 49ers’ new regime, the club has already invested more in the free-agent market than a year ago under then-general manager Trent Baalke.
Just a reminder: The free-agent signing period does not officially open until March 9.
The 49ers on Friday reached a contract agreement with veteran defensive tackle Earl Mitchell, who is penciled into be a starter in the team’s new 4-3 base scheme under defensive coordinator Robert Saleh.
It was the first significant move under new general manager John Lynch, who also signed a player with NFL experience earlier in the week.
The 49ers also added cornerback K’Waun Williams to a one-year contract. Williams served as the Cleveland Browns’ nickel back for two seasons. The Browns released him before the start of last season and he was unable to play due to an ankle injury.
Mitchell was available to be signed before the start of the new league year because the Miami Dolphins released him last week in a move to save the team $4 million in cap space.
Mitchell took four free-agent visits and after wrapping up his tour with the Atlanta Falcons on Friday, he and the 49ers quickly agreed on a four-year, $16 million contract that includes $5.5 million of money in the first year, according to a source.
Last year, Baalke did little to improve the roster for coach Chip Kelly. The 49ers, who finished 5-11 in Jim Tomsula's one season, dropped to 2-14. Just hours after the season concluded, the 49ers announced the firings of Baalke and Kelly.
The only veteran free-agent addition who stepped on the field for the 49ers last season was offensive lineman Zane Beadles. The 49ers signed Beadles in late-March to a three-year, $9.75 million contract with a $1.75 million signing bonus. Beadles had a good season for the 49ers, starting 13 games at left guard and the final three games at left tackle.
The 49ers have already shown more willingness to be aggressive under Lynch’s leadership.
Mitchell, 29, is a seven-year veteran who began his NFL career from 2010 to ’13 with the Houston Texans. He was a rookie in Saleh’s final season as assistant linebackers coach in Houston.
Mitchell joins DeForest Buckner, Arik Armstead and Quinton Dial on the 49ers defensive line. The 49ers view Mitchell as a high-energy player who bring good character to the locker room. The signing of Mitchell could be an indication the 49ers are moving on from Glenn Dorsey, who is scheduled to be an unrestricted free agent.
With 5.5 sacks in seven seasons, the 49ers do not figure to use Mitchell in passing situations. The club must try to bolster its pass rush in free agency or the draft. Last season, Buckner and Ahmad Brooks shared the team-lead with six sacks apiece. In 2015, Brooks and Aaron Lynch both led the way with 6.5 sacks.
At Scottsdale, Arizona, Chris Marrero hit a three-run homer in the bottom of the ninth and drove in four runs as the Giants rallied after Madison Bumgarner gave up two runs on two hits in the top of the first.
Marrero, a 2006 first-round draft pick of the Nationals trying to revive his career as a non-roster invitee, had an RBI single in the fifth.
Kevin Shackelford, the seventh Cincinnati pitcher, walked Orlando Calixte to open the ninth and Christian Arroyo blooped a single into left field before Marrero hit a line drive over the wall in left centerfield.
Patrick Kivlehan had a two-run single off Bumgarner in the first and Hunter Pence doubled in a run off Reds starter Rookie Davis. Davis, acquired from the Yankees in the Aroldis Chapman deal, is likely to open with Double-A Pensacola this year.