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Chad Johnson’s stint as a guest/coaching assistant at Browns training camp may be over.

Johnson wasn’t at practice Monday, and Browns coach Hue Jackson told reporters that the former wide receiver was tending to some other business. Jackson said he’s not sure if Johnson will be back with the Browns later in camp, which started last Friday.

“He learned coaching is a tough business,” Jackson said.

On Saturday night, Johnson tweeted: “These are the best 14 hour work days ever!”

Jackson and Johnson have a longstanding and close relationship. Johnson lobbied for his old coach to bring him to training camp via social media.