The Chiefs officially traded for Alex Smith on Tuesday, the first day of the new league year — and nearly two weeks after the San Francisco 49ers agreed to the deal. All that’s left is for Smith to pass a physical and the paperwork to be filed with the league.

That business is expected to be finished Wednesday.

The 49ers will receive the Chiefs’ second-round pick, 34th overall, in this year’s draft and a conditional pick in next year’s draft, a person familiar with the terms told The Associated Press. The person spoke on condition of anonymity because the terms were not disclosed.

Under the three-year contract he signed last March, Smith is guaranteed $8.5 million for the 2013 season, though it’s possible the Chiefs will attempt to sign him to a new deal.

The poor play of Matt Cassel, who has two years left on a six-year, $63 million deal, is one of the reasons the Chiefs went 2-14 last year and have the No. 1 pick in the NFL draft, and why the new front office targeted Smith in the days and weeks after their arrival.

Smith had eight up-and-down years with the 49ers, but thrived under coach Jim Harbaugh. He went 13-3 as the starter two years ago, and was 6-2 at the midway point this past season, completing 18 of 19 passes with three TDs in a Monday night win over Arizona on Oct. 29.

He then sustained a concussion in the second quarter of a 24-24 tie against St. Louis on Nov. 11, saying later he threw a touchdown pass with blurry vision. Smith sat out the next game, Colin Kaepernick dazzled in his debut as an NFL starter — and Smith never started again.

Kaepernick led the 49ers to the Super Bowl and Smith became expendable.

Smith approached the delicate situation with grace, and said in response to questions about it, “I feel like the only thing I did to lose my job was get a concussion.”

“We would like to thank Alex for his contributions to the 49ers organization over the past eight years,” 49ers GM Trent Baalke said in a statement Tuesday. “He is a true professional who represented the 49ers with class on and off the field.”

The 49ers also landed another playmaking wide receiver to catch those deep passes from Kaepernick.

San Francisco agreed Tuesday to acquire Anquan Boldin from the Super Bowl champion Baltimore Ravens for a sixth-round draft pick.

The deal, announced by the team shortly after the start of the free agency period Tuesday, is pending a physical. Boldin expressed surprise at the trade and thanked the Ravens’ supporters in a series of posts on Twitter.

“I would like to thank the Ravens fans for their incredible support for myself and my family throughout my years in Baltimore,” he said Tuesday. “I am grateful in getting to know you and will miss what I call home. I thought this was the last stop of my career but regardless of the circumstances I came here to win a Championship … and in February we came home Champions. For my future in San Francisco, I will leave that in God’s hands.”

He was a big key in Baltimore’s 34-31 Super Bowl victory against the 49ers on Feb. 3 in New Orleans. Boldin made six catches for 104 yards and the game’s first touchdown, and also had five receptions for 60 yards and two TDs in a victory over New England in the AFC title game.

The 32-year-old Boldin had 65 catches for 921 yards and four touchdowns for the Ravens last season. Now, he will switch from playing for John Harbaugh to younger brother and 49ers coach Jim Harbaugh as the receiver begins his 11th NFL season.

“We are excited to add Anquan to our roster,” Baalke said in a statement. “He is a highly competitive and productive player with strong leadership qualities that will be a welcome addition to our team and community.”

Last spring, the 49ers did something similar when they signed wideout Mario Manningham and running back Brandon Jacobs, both from the New York Giants — the team that beat the 49ers in overtime of the NFC championship game.

With Manningham coming back from reconstructive left knee surgery and Randy Moss not expected to return after one season in San Francisco, Boldin brings the kind of big playmaking ability that should fit in well with strong-armed Kaepernick and complement Michael Crabtree in the offense.

Boldin was due to earn $6 million this season in the final year of his contract. After he and the Ravens failed to agree on a restructured deal, Baltimore worked the swap with San Francisco rather than simply cut him from the roster.

After playing his first seven NFL seasons with Arizona, Boldin spent the past three years with the Ravens.

Boldin and former Cardinals teammate Larry Fitzgerald were in West Africa continuing their efforts with international relief. Boldin was expected to remain in Africa through Thursday and was not immediately available for comment aside from his Twitter posts, and the 49ers won’t plan anything formal until he passes a physical.

Free-agent safety Dashon Goldson, the team’s franchise player last season, was scheduled to meet Tuesday with Tampa Bay officials, a person with knowledge of the session said. The person spoke on condition of anonymity because the meeting wasn’t made public.

Goldson, who has spent his first six NFL seasons with the Niners, made it clear he did not want to return to San Francisco on a one-year deal and would head into the offseason open to hearing from all teams as he sought a multiyear contract.

He had 69 tackles, three interceptions and a forced fumble last season for the NFC champions.

Goldson played on one-year contracts each of the past two seasons, including the $6.2 million franchise tag in 2012.

“I’m not expecting anything,” he said as he packed his locker two days after the Super Bowl loss. “Somewhere. Anywhere. Hopefully, it will be this team. But I’m open to all 32 teams.”

Jim Harbaugh said when the season ended that re-signing Goldson was among his top priorities.

On March 4, Goldson said on his Twitter account, “I’m very thankful I didn’t get the franchise tag again but still hopeful this means something long term with the San Francisco 49ers!”

Then Monday, he posted, “Things are jingling in the football world today,” with a hashtag of “theracebegins.”

Chiefs defensive end Glenn Dorsey is scheduled to meet with the 49ers in the Bay Area on Wednesday, his agent, Joel Segal, said. Cornerback Charles Woodson, whose Green Bay Packers lost at San Francisco in the NFC divisional playoffs, also reportedly was set to visit.