SPARTANBURG, S.C. -- Among the admirers of rookie running back Christian McCaffrey is the player who might have his role altered by the arrival of the first-round draft pick.
Carolina running back Jonathan Stewart said he has been impressed with McCaffrey.
"For one, you guys notice we have No. 22 out there," he said. "He's pretty unstoppable as far as coming out of the backfield and running routes."
So Stewart, who's heading into his 10th season with the Panthers, has clearly endorsed the ways McCaffrey can aid the offense.
"He's a special player and we have to use him in the right ways," Stewart said.
Offensive coordinator Mike Shula should have the ingredients to add numerous wrinkles to the offense.
"Coach Shula has definitely found some pretty good ways to put him in positions to win," Stewart said. "It's a very special situation."
McCaffrey has shown everything from explosiveness to shiftiness. He has left his defensive teammates reaching for him in vain at times.
"I think that first move is really to set you up," coach Ron Rivera said of McCaffrey's ability to make defenders miss.
Stewart said McCaffrey arrived with the knack to look like he has been around for quite some time.
"His preparation has been a difference maker," Stewart said. "His preparation has been like a vet, which is should be."
Stewart, though, has plenty riding on the season as well.
He started all 13 games in which he played last season, leading the team in rushing for the third season in a row. He held that team rushing title in five seasons in his career. He is 213 yards away from becoming the Carolina career rushing leader. He has rushed for 6,638 yards so far.
"Whenever you come off a year like last year, there's just this extra 'I don't want to take it for granted' attitude," Stewart said. "My body is pretty fresh and my mind is fresh.
"I'm just trying to work on my craft and get better each and every day."
McCaffrey, though, was a popular topic across the first week of training camp. He must be doing the right things because many of the veteran players seemed interested in talking about his qualities.
"He's a kid who can handle a lot," tight end Greg Olsen said. "I don't think any of us are surprised."
NOTES: Cornerback Captain Munnerlyn (hamstring) was active on the practice field Tuesday after missing a week of training camp upon his return to the organization. He is supposed to provide a veteran influence in the secondary and getting him on the field is important... Wide receiver Curtis Samuel missed practice time because of hamstring problems. The rookie figures to be a key part of the plan on offense if he is going at full speed... Cornerback Corn Elder, a rookie who could factor into the return units, was hobbled because of a knee issue and it's unclear when he might be back on the field... Defensive lineman Drew Iddings signed at the beginning of camp. He is a 6-foot-6, 300-pound player. At age 24, the former South Dakota player was previously with the Oakland Raiders as an undrafted player.