The Arizona Cardinals didn't announce their roster cuts Friday, even as head coach Bruce Arians met with the media in the early afternoon. They must be down to 53 players by 1 p.m. Saturday.

ESPN.com has confirmed, however, that Arizona released linebacker Marcus Benard, defensive lineman Isaac Sopoaga and running back Jalen Parmele.

Cornerback Bryan McCann has also been released, according to his agent, John Biggins.

After final cuts last season, the Cardinals added two free agents who played significant roles throughout the season. Bradley Sowell became the Cardinals' starting left tackle and nose tackle Alameda Ta'amu became Dan Williams' backup.

When cuts are finalized this season and the waiver wire starts buzzing, Arians and general manager Steve Keim will be refreshing the page as often as possible.

"You're always searching that waiver wire because there's always a diamond in there, if you can find it," Arians said. "The bottom five guys on the roster are never safe. You want to keep it that way. You're always churning.

"If there's one better and [they] bring something, especially in a role, because you're talking about role players now, if you can find a guy who fits a specific role to help your team, then you definitely go get them."

Arizona has already begun churning through free agents. The Cardinals signed Sopoaga last week and defensive lineman Tommy Kelly this week. Sopoaga was cut and Kelly looks like he'll make the team.

"Tommy did alright for jumping on the plane and jumping in there," Arians said. "He did fine, and look forward to seeing him out there some more."

According to ESPN NFL Insider Adam Schefter, free agent linebacker James Harrison won't be signing with the Cardinals despite a good visit with the team.