Per a report from Mary Kay Cabot of the Cleveland Plain Dealer, the Browns were anxious Gordon had a relapse in his substance abuse addiction.
Gordon, now 27 years old, led the National Football League with 1,646 receiving yards on 87 receptions in 2013, but then played just 10 games over the next four seasons while serving multiple suspensions resulting from violations of the NFL's substance abuse policy.
Multiple violations of the NFL's policy on substances of abuse sidelined Gordon for most of his pro career since the Browns drafted him in the second round in 2012.
If the Browns release Gordon on Monday as stated, he'd become a free agent and wouldn't require to clear waivers. Gordon reportedly had told the team his hamstring was bothering him.
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Once that happens, Gordon will leave behind a very complicated legacy in Cleveland.
ESPN's Adam Schefter reported Gordon injured his hamstring at a promotional shoot, and the Browns, leery of his past missteps, are reportedly already attempting to find willing trade partners. The event was not sponsored by the team but was for a line of products, possibly clothing, that the receiver was endorsing, the source said.
Gordon, who has a long history of substance abuse and suspensions, missed three weeks of training camp this summer to undergo counseling and treatment, and recently said he was in a good place mentally and physically. He scored last week for Cleveland in its season-opening tie against the Steelers.
Jackson refused to elaborate on the situation this week, saying he and the coaching staff wanted to "move on". He was also out for 2015 and 2016, before returning midway through last season.
Others were perplexed, wondering why the Browns would cut Gordon now after sticking with him for so many years.