On the eve of NFL free agency, trades involving top receivers Anquan Boldin and Percy Harvin grabbed the headlines.

In an odd twist Monday, Boldin went from the Ravens to the San Francisco 49ers, the team he helped Baltimore beat 34-31 in last month’s Super Bowl.

Harvin, who expressed his discontent in Minnesota, was sent to Seattle, where he will join former Vikings teammate Sidney Rice.

San Francisco acquired the 32-year-old Boldin for a sixth-round draft pick. Boldin, a star in Baltimore’s run to the Super Bowl title last season, must pass a physical to complete the deal.

“Anquan was a great receiver for myself and for our football team,” said quarterback Joe Flacco, who signed a six-year, $120.6 million deal with the Ravens last week. “It’s sad to see a guy like that go, but at the same time, you want what’s best for him and you just wish him the best of luck.

“Anquan was a big part of this football team, a big part of this offense. He’s one of the main reasons we won the Super Bowl this year.”

Boldin had six catches for 104 yards and a touchdown in the Super Bowl victory. He had said he’d consider retirement rather than leave Baltimore. But going to the NFC champions might change his mind.

The 24-year-old Harvin, Minnesota’s moody and multi-talented receiver, will join the Seahawks for a package of draft picks that includes Seattle’s first-round selection next month, No. 25 overall. He also must pass a physical.

Minnesota will also get Seattle’s seventh-round pick this year and third-round selection in 2014.

Also Monday:

• The Giants are allowing Victor Cruz to enter restricted free agency, placing a first-round tender on the wide receiver.

Team owner John Mara said the Giants will risk having Cruz agree to a contract with another club. New York has the right to match any offer. If the Giants allow him to leave, they will get a first-round draft choice as compensation.

• Cornerback DeAngelo Hall was cut by the Redskins, a casualty of the team’s NFL-imposed salary cap penalty. Washington is over the cap because of an $18 million sanction for the way it structured contracts during the 2010 uncapped season.

• The Broncos released nine-year veteran linebacker D.J. Williams, freeing up his $6 million salary in 2013 for other needs.

• The Jets signed quarterback David Garrard to back up — and provide a challenge to — starter Mark Sanchez. Garrard has not played in the NFL since 2010. He started 76 games in nine seasons with Jacksonville and played in the 2009 Pro Bowl.

• The Cardinals released running back Beanie Wells after four injury-plagued seasons. A first-round pick in 2009, Wells showed flashes of the brilliance he had at Ohio State, but has only played one full season — his rookie year.

Wells eclipsed 1,000 yards and scored 10 touchdowns in 2011, but was limited to eight games last season due to turf toe.