The Facts: The 49ers signed Swain, who the club determined had the most impressive tryout Tuesday at the team's practice facility in Santa Clara, a source said.
Diehards Line:Swain, 26, played 16 games for the Green Bay Packers last year, and appeared in the Super Bowl. He caught six passes for 72 yards. The 49ers were in the market for a WR after Josh Morgan sustained a potential season-ending leg injury Sunday in the team's 48-3 victory over the Buccaneers. Morgan underwent surgery on his broken right lower leg on Monday. According to CSNBayArea.com's Matt Maiocco, Swain had the best overall performance during a workout Tuesday that included veteran wide receivers T.J. Houshmandzadeh, Chris Chambers, and Brian Finneran, as well as practice-squad players Joe Hastings and John Matthews.