Stanton, who signed a three-year, $8.2 million contract according to his agent, worked with Arians as the Colts' backup quarterback behind Andrew Luck. He did not take a regular-season snap in 2012, but does come to Arizona with a complete knowledge of the offensive system used by Arians as the Colts' offensive coordinator and interim head coach.
Stanton joins four other quarterbacks on the Cardinals roster: restricted free agent Brian Hoyer, Kevin Kolb, John Skelton and Ryan Lindley.
One or more of the Cardinals quarterbacks could be released, including the high-priced Kolb who is scheduled to be paid a $2 million roster bonus and a $9 million base salary in 2013.
The question remains: Will the Cardinals, owners of the seventh overall pick in the NFL Draft, still opt to take a quarterback such as Matt Barkley, who impressed them during the NFL Combine?