The San Francisco 49ers acquired wide receiver Anquan Boldin from the Baltimore Ravens for a sixth-round pick in the 2013 draft.
The deal will not be official until Tuesday. The 2013 league year begins at 4 p.m.
Boldin refused to reduce his salary by $2 million when approached by the Ravens last week. He said he deserved the $6 million base salary he was owed as a "matter of principle."
Boldin is in the final year of his contract but at 32 and lacking top-end speed, was viewed as a pricey investment for the Ravens, who needed to free money to attempt to retain other players. Inside linebacker Dannell Ellberbe and outside linebacker Paul Kruger are two of the team's top unrestricted free agents, but the Ravens might not be able to create enough salary cap space to bring them back.
Still, the move shocked many in the Ravens locker room. Linebacker Brendon Ayanbadejo asked via Twitter: "The boldin trade wow. Do we even win the game with out him?"
Boldin made several critical catches in the Super Bowl for the Ravens, giving the 49ers a good reference for setting expectations for the upcoming season.Boldin turns 33 on Oct. 3.
"When I signed with the Ravens, I signed for four years. With me, it's all about principles. At no point, no matter how well I played, would I come back to the table and say, 'I need more money,'" Boldin said last week.
"I know how the Ravens feel about me, from a coaching standpoint, from an organizational standpoint, from guys in the locker room. But sometimes the business side doesn't express that."
He caught 65 passes last season and has at least 55 receptions in each of his nine NFL seasons. Boldin showed he is still capable of consistent production in the postseason and fills a pressing need for a No. 2 receiver for the 49ers.
San Francisco's No. 1 receiver, Michael Crabtree, had a team-high 85 receptions last season. No other receiver had half that total and Mario Manningham (42 receptions) isn't likely to be ready for the start of training camp because of multiple ligament tears in his left knee.
Boldin had 22 receptions for 380 yards (17.3 yards per catch) and four touchdowns in the 2012 postseason.
He joined the Ravens on March 5, 2010, in a trade from the Arizona Cardinals.