The Baltimore Ravens agreed to trade receiver Anquan Boldin to the San Francisco 49ers, the team they beat last month in the Super Bowl, sources confirmed to ESPN.

The Ravens will receive a sixth-round draft choice in return, the sources said.

Boldin, who is in Africa on a mission, needs to pass a physical before the trade with San Francisco becomes complete.

The trade agreement was earlier reported by the Baltimore Sun.

Ravens receiver Torrey Smith took news of the trade hard, venting through his Twitter account.

"This business is BS at times," he wrote.

While Smith was upset, Boldin's potential new quarterback, Colin Kaepernick, was excited by the trade when he spoke with ESPN.

"If it's true, it's a great trade," Kaepernick told ESPN. "We're happy to have him. Having a playmaker like that at receiver is something you always want. It's another weapon for our offense and our team."

Kaepernick added that he thought the Niners were getting Boldin at a great value.

"He's a great player," Kaepernick said. "I don't think you're going to find anybody in the sixth round to come in and play better than what he's doing right now."