The plan is for Palmer to sit out of six organized team activities before throwing in the final three. He will also throw during the entire three-day minicamp, but even his participation in those sessions will be limited.
Palmer said he had thrown too much in the off-season for quite some time.
“I don’t think I’ve done a good job, probably, the last eight or nine years,” he said. “I’ve treated the last eight or nine years like I was 24, 25, 26. You’ve got to adapt, and it’s difficult for me to do.”
He said he had already thrown far fewer passes than he usually would have by now.
“March and April really is where I’m used to throwing and throwing and throwing,” Palmer said. Instead of piling up those repetitions, he is focusing on footwork and working out the muscles around his shoulder, he said. “You can still work without throwing the football,” he added.
While Palmer watches, Drew Stanton and Blaine Gabbert have worked with the No. 1 unit. Stanton has been the backup to Palmer since Arians became Arizona’s coach four seasons ago.
“Drew had a great day,” Arians said. “Blaine jumped in there and made a mistake or two, but he’s only been here a day. I’m really pleased with how the quarterback work has gone.”
Stanton, 33, remains firmly in the No. 2 role, with Gabbert behind him. The other two quarterbacks — Zac Dysert and the rookie Trevor Knight — worked out on a second practice field.
Gabbert, who signed a one-year contract with Arizona last week, has had a disappointing career since being drafted in the first round by Jacksonville in 2011. He has never run the same offense two years in a row.
In the locker room Tuesday, Gabbert quickly rattled off the names of the half-dozen offensive coordinators he has had. The frequent changes have added up to numerous offensive schemes to learn.
“The good thing and the bad thing is this is the seventh I’ve had to learn in seven years,” he said. “So I think I have the way to learn a system down pretty well.”
Palmer said he liked the Gabbert signing.
“He’s a former first-round pick and been through a lot of coordinators, been through a couple of teams,” Palmer said. “Sometimes it just takes, especially at the quarterback position, the right fit, and I trust this organization’s decisions and the moves they make, and I’m looking forward to working with him.”
Palmer had a big year in 2015, throwing for 4,671 yards and 35 touchdowns, both career highs, in leading Arizona to a 13-3 record and a spot in the N.F.C. championship game.
But from the start last season, Palmer seemed to lack the same velocity on the ball. He had a hard time connecting downfield on the long passes that are a big part of Arians’s wide-open offense.
Then, in the bye week midway through the season, Arians decided that…