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.

Peters tore his left ACL in practice on Wednesday. Starting left guard Mike Iupati will undergo surgery for a torn left meniscus.

Coach Bruce Arians says Iupati is out three to eight weeks, meaning he could miss the first five games of the season.

More from FoxSports

Peters tore an ACL for the second time in three seasons. He tore his right ACL late in the 2013 campaign.

Arians says rookie Rodney Gunter, a fourth-round pick from Delaware State, will move into the starting nose tackle role.

Ted Larsen will be the new left guard. Larsen started at the position for Arizona all of last season.

---

Online:

AP NFL website: www.pro32.ap.org and AP NFL Twitter feed: www.twitter.com/AP-NFL