According to a league source, Clayton has made a sound recovery from tearing his patellar tendon in his right knee last year and is on the verge of being ready to play again.
He recently visited the St. Louis Rams.
Clayton is a former Baltimore Ravens first-round draft pick from Oklahoma who was traded to the Rams last year.
In his first game with the Rams, Clayton caught 10 passes for 119 yards. He was placed on injured reserve after the fifth week of the regular season
Clayton was an All-Big 12 and All-American selection for the Sooners, catching 83 passes for 1,4225 yards and 15 touchdowns as a junior.
In his second season in the NFL with the Ravens, he caught 67 passes for 939 yards and five touchdowns.
Clayton is a quick, sure-handed downfield target.
The Texas native is known as a high-character individual.