According to the Arizona Cardinals twitter account quarterback Carson Palmer has announced his retirement.
Palmer spent 15 years in the NFL.
“Over the years, I’ve had teammates who decided to hang it up and I would ask them how they knew when it was time to walk away,” Palmer wrote. “The answer was almost always the same: You just know.
“For me that time is now. Why? Quite simply, I just know.”
An open letter from Carson Palmer.
— Arizona Cardinals (@AZCardinals) January 2, 2018