Arians: Palmer 'wore his arm out by overthrowing' last summer

The 2017 NFL season inches closer, but more explanations for the Arizona Cardinals' disappointing 2016 season continue to flood in.

Speaking on "The Rich Eisen Show" last week, Cardinals head coach Bruce Arians revealed that quarterback Carson Palmer began the year with arm fatigue.

"He's one of the hardest working dudes I've ever been around, so we have to pull the reins back on him," Arians said. "Last year, he came in to September, he had already wore his arm out by overthrowing all summer."

The Cardinals began the year 1-3, including a four-interception performance by Palmer in Week 3 against the Buffalo Bills.

Arizona eventually found a way to turn it around, but the damage had been done. They finished the year 7-8-1, which came on the heels of an encouraging 13-3 season.

"We found a nice regimen, (and by) November and December he was playing as good as he's ever played," Arians said of Palmer.

Lump Palmer throwing too much in with losing to the Jimmy Garoppolo-led Patriots in Week 1 and playing "stupid at times" as reasons for the Cardinals regression.