The wide receiver already worked out last week for the New Orleans Saints, and was said to be impressive.
The 49ers are seeking to improve at receiver after the team's wideouts managed just one catch for 3 yards in a 20-17 loss to the New York Giants in the NFC Championship Game. Joshua Morgan, who broke a bone in his leg in October, and Ted Ginn Jr. are scheduled to be free agents. The 49ers released Braylon Edwards in December after signing him to a one-year deal last summer.
He announced on his 35th birthday that he was ending his one-year retirement from the NFL.
Moss' 153 touchdown receptions are tied with Terrell Owens for second on the career list. He's fifth all-time in yards and ninth in receptions. His 29 touchdowns of at least 50 yards are behind only Jerry Rice (36).
He led the NFL in touchdown receptions five times, was selected to the Pro Bowl six times and was named first team All-Pro four times. His 23 TDs in 2007 led the entire NFL and his 138 points scored that season were second only to kicker Mason Crosby.
Information from The Associated Press was used in this report.