The answer was nearly always the same: "You just know", Palmer began.
Palmer spent the past five seasons in Arizona and retires owning the franchise records for passing yards (4,671) and passing touchdowns (35) in a season.
The Arizona Cardinals are expected to interview defensive coordinator James Bettcher for the open head coaching position Wednesday morning, according to 98.7 FM Arizona's Sports Station's Mike Jurecki.
Man arrested after finding weapons inside Houston hotel room
Officers say he fought with security and they tried to escort him back to his room but he was kicked out of the hotel. The man, who has not been identified, was arrested for unlawfully carrying a weapon and trespassing.
"For me, that time is now". Palmer's 87.9 passer rating ranks 19th all-time. "Quite simply, I just know". For 15 years I've been able to play quarterback in the National Football League, and it's been the most incredible experience in my life.
Palmer missed the second half of the season because of a broken arm after taking a hit against the Los Angeles Rams in London.
Palmer made two starts in the playoffs for the Cardinals, winning one game and losing the 2015 NFC Championship to the Carolina Panthers.
When I entered the league, I was a 23-year old kid.
The retirement of Palmer, though not unexpected, leaves the Cardinals without a quarterback on their roster. Veteran wide receiver Larry Fitzgerald has yet to announce his decision for next season, but the end of his career could be just around the corner as well.