Gunter said Arians told him Wednesday night that he would be the starter.
Iupati,Wholesale NFL Jerseys, a three-time Pro Bowl selection with San Francisco and a member of The Associated Press all-pro team in 2012 , was Arizona's biggest free agent acquisition.  He signed a five-year, $40 million contract with $22.5 million guaranteed.
"He's made plays in camp against our ones that are like 'Wow. This guy could be special,'" Campbell said. "We've just got to figure out how to get it out of him consistently."
Iupati is considered one of the best run blockers in the league and the Cardinals ranked last in the NFL at 3.3 yards per carry last season.
"He's one of those country boys that you wouldn't want to fight in a bar fight," cornerback Jerraud Powers said. "He's had a hell of a camp."
He played all five of his pro seasons with Atlanta, starting all 15 games before he was hurt in 2013. He appeared in 14 games with the Falcons last season.
GLENDALE, Ariz. (AP) — Two of the Arizona Cardinals' most significant offseason acquisitions are injured, one of them — starting nose tackle Corey Peters — is lost for the season.
"He's got all over the quarterback a bunch of times," Arians said. "The centers have had a really, really rough time with his length and strength."
Notes: Arians said he would like to get new signee Chris Johnson five or six carries against San Diego on Saturday night. Arians said he expects rookie running back David Johnson to play most of the second quarter and the entire third. ... With a suspension of as many as three games looming for Bobby Massie, Bradley Sowell has been practicing with the first string, ahead of first-round draft pick D.J. Humphries. "Bradley's a pro, he shows up every day. D.J.'s a rookie, he shows up once every week." ... Arizona was told "Bird Gang' 'fans want to know about the status of inside linebacker Daryl Washington, who sat out all of last season due to violating the league's substance abuse policy and has not been reinstated. "The league hasn't notified me of anything, so I would ask the Bird Gang to please call Daryl."
He said he wasn't surprised Arians turned to him as Peters' replacement.
"He was just running toward the ball," Arians said. "Nobody touched him."
"It's obviously a little bit of a drop-off," Arians said of the injury's impact,Wholesale Authentic Jerseys, "but we will be better than we were (last year)."
Defensive end Calais Campbell said Gunter "is very physically blessed and he's got good instinct."
Peters signed a three-year, $10.5 million deal with $3.75 million guaranteed.
"I'm surrounded by greatness," Gunter said, "so I have no other choice but to be great."
"The second time around it's really devastating," Arians said before Thursday's practice, "because he was having such a great camp."
Peters tore an Achilles for the second time in three seasons,NFL Cheap Jerseys. He tore his right Achilles tendon late in the 2013 campaign.
Ted Larsen will be the new left guard. Larsen started at the position for Arizona all of last season. But Arians said Earl Watford "will fight for that left guard spot because he's had such a good camp. He's also in the fight for right guard, right tackle."
Gunter, a massive 6-foot-5 and 305 pounds, has been impressive throughout camp.
Arians said rookie Rodney Gunter, a fourth-round pick from Delaware State, will move into the starting nose tackle role.
Gunter agreed with Campbell's assessment that he was "born to play football." He said he will lean on veterans Campbell and defensive tackle Frostee Rucker for help,Cheap Jerseys From China.
"It's time for the rookie to step up," Gunter said, "time to go to work, time to grow up fast."
Coach Bruce Arians said Iupati is out three to eight weeks, meaning he could miss the first five games of the season.
Peters was hurt without any contact.

Gunter burst through to tackle Kansas City backup quarterback Aaron Murray for a safety in the preseason opener Saturday night,Authentic Jerseys China.
"I've been working hard," Gunter said. "I've been improving since OTAs, rookie minicamp. A lot of vets believe in me. I'm ready to do my job."
Peters tore his left Achilles tendon in practice Wednesday. Starting left guard Mike Iupati will undergo surgery for a torn left meniscus. Iupati was hurt in Tuesday's practice,Wholesale Jerseys Free Shipping.