(AP) — Browns wide receiver Josh Gordon has been reinstated on a conditional basis by NFL Commissioner Roger Goodell, although he will be suspended for the first four games of this season.

Gordon has been banned since February 2015 for multiple violations of the league's drug policies. He can take part in preseason practices and games this summer and will become eligible to rejoin the Browns on Oct. 3 if he stays clean.

Gordon played just five games two years ago after grabbing 87 passes for a league-leading 1,646 yard and nine touchdowns in 2013.

Meanwhile, the NFL is investigating whether a video linked to an account from suspended Oakland Raiders linebacker Aldon Smith shows him using illegal drugs.

The video features an unidentified man off camera discussing a rolled cigarette with an unidentified woman, though it's not clear what's in the cigarette.

Smith sent out a tweet Monday after CSNBayArea.com reported on the video saying "Good try, not me."

Smith is serving a one-year suspension for violating the league's substance abuse policy, a punishment that is scheduled to end Nov. 17.

Checking out the rest of the NFL:

— The league says it found no credible evidence that Peyton Manning was provided with HGH or other prohibited substances as alleged in a documentary by Al-Jazeera America last fall. The NFL said the quarterback and his wife fully cooperated in the seven-month investigation, providing interviews and access to all records sought by investigators. Manning vehemently denied the allegations when they were made late in the season.

— Texans defensive end J.J. Watt has been put on the physically unable to perform list just a week before the start of training camp. Watt recently had back surgery but is expected to be ready for the NFL season opener after leading the league with 17 ½ sacks last year.

— Receiver Jordy Nelson was one of six Packers placed on the physically unable to perform list. Nelson is coming back from a torn right ACL injury that kept him out for the 2015 season.

— Greg Jennings is retiring after 10 NFL seasons, saying on social media that "football is over. I'm done." The 32-year-old ends his career with 571 catches for 8,291 yards and 64 touchdowns.

— Vikings right tackle Phil Loadholt has decided to retire after seven seasons with the team. The former second-round draft pick sat out just one game during his first five years in the league before appearing in just 10 the last two seasons due to injuries.