It's almost impossible to draw any conclusions after a first day.
A first impression, however, can speak volumes.
"Really pleased with the first day, outstanding work, great effort by everybody," head coach Bruce Arians said. "The work was outstanding at both sides of the ball and in the kicking game."
The Arizona Cardinals opened a three-day voluntary veteran mini-camp Tuesday, marking the first time the offense and defense were permitted on the field together.
"Before we had trash cans set up as supposed defenders," quarterback Carson Palmer said. "Now there's a defense across the ball and you've got Patrick Peterson and (Darnell) Dockett, Daryl (Washington) and all those guys. There's some good football players across from us. It's been good competition."
Players are allowed to wear helmets, but no pads at this stage of the offseason.
"Right now it's a lot of teaching," Palmer said. "The coaching gets in after we've had tons of repetitions at it, but right now, we're just kind of scratching the surface, getting started."
Palmer said three quarters of the offense is in, but much work still needs to be done learning a brand new system.
"Over the last three weeks we've had a lot of meetings and really had a chance to open the playbook up and kind of get our feet wet with it. (Today) was a good start for getting kind of some of the basics and the staples of the offense down."
Arians was pleased with how well the players took what they've learned in the classroom and in film study to the field.
"To be able to see them play that fast so quickly is very encouraging," he said.
The only player absent from practice was wide receiver Larry Fitzgerald. He had a "previous engagement" according to Arians. "I was totally fine with it. He'll be back (Wednesday)."
Offensive lineman Levi Brown (triceps) and linebacker O'Brien Schofield (ankle) did not practice. They continue to rehab and worked out on the side.
"We think we know what we have, but now we get to see it," Arians said. "It's going to be a good week. We've got a nice barometer for what we have."