"When I entered the league, I was a 23-year-old kid", Palmer wrote. The answer was nearly always the same: "'You just know.'" Palmer said in a letter published by the Cardinals.
"For me that time is now. Why?"
"What I'll never forget are the relationships - not just the unbelievable teammates and coaches, but all of those countless people at the Bengals, Raiders and Cardinals who work behind the scenes to make this whole thing run". Palmer missed the last nine games of what would be his final season with a broken left arm.More news: Moses: Winning EPL Title 2017 Highlight; Chelsea Can Still Catch City
Palmer, who turned 38 last week, was the first overall pick of the Cincinnati Bengals in 2003. "Man I'm gonna miss the hell out of [you guys] I promise".
With the quarterback following head coach Bruce Arians into retirement, the Cardinals could be ready to usher in a new era.
Fox coached the Broncos to a 46-18 record, four consecutive division titles and a Super Bowl appearance, but that level of success did not travel with him to the Windy City. Of course, if not for a pair of untimely ACL injuries during the 2006 playoffs and 2014 regular season, things could have been different for Palmer. The Cardinals now do not have any quarterbacks under contract for 2018. Arizona could look to sign a quarterback in free agency or explore their options in the draft. Palmer threw for more than 16,000 yards in his Cardinals career with 105 touchdowns and 57 interceptions. He says something else stands out about his 15 years in the NFL.
"In the end, it's not what happens on the football field that sticks with you".
"Now it's time for something else, and I'm excited to find out exactly what that will be".