New England Patriots wide receiver Josh Gordon (10) plays against the Pittsburgh Steelers in an NFL football game, Sunday, Dec. 16, 2018, in Pittsburgh. (AP Photo/Don Wright)

FOXBOROUGH, Mass. — Patriots receiver Josh Gordon was suspended indefinitely Thursday by the NFL for violating an agreement that allowed him to play after multiple drug suspensions, casting doubt on whether the talented but troubled playmaker would ever play in the league again.

League officials said Thursday that Gordon was returned to the reserve/commissioner suspended list indefinitely for breaking the terms of his reinstatement under the NFL substance abuse policy.

The news came several hours after Gordon said he was stepping away from football to focus on his mental health.

Gordon said on Twitter his decision was spurred by his own feelings that he could have a better grasp on things mentally. He thanked the Patriots for their support and vowed to work his way back.

“We support Josh Gordon in his continued efforts to focus on his health. His attempt to do so is a private and personal matter, which we intend to respect,” Patriots team officials said.

Gordon has been suspended several times by the NFL for violations of its drug policies since being drafted by the Browns in 2012, and missed the entire 2015 and 2016 seasons.

After being reinstated by NFL Commissioner Roger Goodell in 2017, Gordon revealed in an interview with GQ magazine that he drank or used marijuana before games. “Probably every game of my career,” he said.

Gordon also said in a 2017 mini-documentary on Uninterreupted.com that he took Xanax, cocaine, marijuana and other narcotics.

Gordon’s outlook had improved with New England, where he landed in September in a trade after the Browns felt it was time to cut ties. He had 40 receptions for 720 yards and three touchdowns with the Patriots, five years removed from an All-Pro season in 2013 with 87 catches for 1,646 yards and nine touchdowns.

Special teams captain and receiver Matt Slater said despite his suspension, Gordon still has support inside the Patriots locker room.

“My No. 1 concern is with him as a man,” Slater said. “I’m thankful for the approach he took here, how he was as a teammate. I enjoyed getting to know him in that process and I’ll continue to support him in any way I can.”

Safety Devin McCourty said the 27-year-old’s well-being is his biggest concern, not football.

“Life comes before all of that,” McCourty said. “I think we wish him the best and care about that more than wins or losses.”

New England officials had insulated Gordon and focused him on getting acclimated to the team’s highly-disciplined culture, while also limiting his time with reporters.

Coach Bill Belichick said last week that Gordon was thriving on the field, developing chemistry with quarterback Tom Brady and learning the offensive system.

“He’s a smart kid, so he learns well,” Belichick said. “For better or worse, he’s been in a lot of different systems. I know it was only one team, but it was a lot of different systems up there. Most everything we’ve asked him to do he’s done somewhere along the line for somebody.

“As we go through each week, I would say we’ve gained a little more ground on the overall knowledge of the system,” he said.

Gordon said earlier this month he thought he was settling in well with New England.

“It felt like home a long time ago,” Gordon said. “The atmosphere is very welcoming. It took me a little bit to get acclimated to the area. Other than that, it’s been pretty smooth so far, and that’s due in part to the facility, the organization, just everybody helping me along the way.”