The Calgary Stampeders have played without running back Jon Cornish for the last three weeks and could be without the reigning Most Outstanding Player for another six.
The Stampeders placed Cornish on the six-game injury list on Wednesday morning and he would be eligible to return on Sept. 6 when the Stampeders play in Edmonton.
Cornish took to Twitter to speak to Calgary fans about the injury.
"To the fans that are worried about stats/accolades... The things I still have left to win aren't won during the season," he wrote.
He also added: "The future of my job(s) and life necessitated making a decision I will not regret."
The team, however, has the right to activate him prior to that date if the situation allows.
"Jon continues to make progress in his recovery but we understand the importance of being extremely careful with this type of injury and we want to make sure Jon has all the time he needs to get completely healthy," said Stampeders general manager and head coach John Hufnagel in a statement. "We look forward to having Jon back in the lineup and, in the meantime, other players have stepped up in his absence. I'm confident that will continue to be the case."
Cornish was diagnosed with a concussion after being knocked out of a Week 1 win over the Montreal Alouettes by linebacker Kyries Hebert.