Cards to work out Matt Barkley

Arizona Cardinals coach Bruce Arians and general manager Steve Keim are scheduled to hold a private workout Saturday at USC for quarterback Matt Barkley, a league source told ESPN NFL Insider Adam Schefter.

The Cardinals traded for quarterback Carson Palmer this week, but that apparently isn't stopping Arizona from searching for its quarterback of the future as well.

Barkley worked out for the Buffalo Bills in Los Angeles on Monday, a league source told ESPN.com.

His pro day last week was attended by 31 of the NFL's 32 teams.

Barkley sprained his shoulder on Nov. 17 against rival UCLA and missed the Trojans' final two games of the 2012 season. Still, he passed for 3,273 yards and 36 touchdowns as a senior, becoming the Pac-12 leader for career passing yards (12,327) and touchdowns (116).

The Cardinals gave up a conditional seventh-round 2014 draft pick and swapped the second of their two sixth-round picks this year for Oakland's seventh-round selection in the trade to acquire Palmer.

Last year, Arizona had four starting quarterbacks -- John Skelton, Kevin Kolb, Ryan Lindley and Brian Hoyer. They combined to throw for 3,383 yards with 11 touchdowns and 21 interceptions and a quarterback rating of 63.1 in an offense that ranked last in the NFL. The Arizona quarterbacks were sacked 58 times in 608 pass attempts. By contrast, Palmer was sacked 28 times last year in 585 throws.

The Cardinals have released Skelton and Kolb and have signed Hoyer to a tender offer. They also have signed free agent Drew Stanton, the backup last season to Andrew Luck in Indianapolis, where Arians was interim coach.

Skelton was claimed on waivers by the Cincinnati Bengals on Wednesday.

Information from ESPN NFL Insider Adam Schefter, ESPN.com AFC East blogger James Walker, WeAreSC.com's Blair Angulo and The Associated Press was used in this report.