That could change as the offseason progresses. The team could draft a quarterback or acquire another veteran. Until then, here are a couple of thoughts on where things stand specifically in relation to Stanton:
Four starts: Stanton has started four games since Detroit made him a second-round choice (43rd overall) in 2007. There's not enough evidence to say much about his prospects. The chart below shows four-game stat totals for Colin Kaepernick, Kolb, Sam Bradford, Stanton, Russell Wilson, John Skelton, Charlie Whitehurst and Ryan Lindley. They are or recently were young NFC West quarterbacks of note. Wilson's hold on the starting job in Seattle appeared tenuous after four games last season. He finished the season in the Pro Bowl. Four games isn't enough to go on.
Circumstances matter: Matt Millen drafted Stanton in Detroit. New Lions leadership drafted Matthew Stafford a year later. That new leadership wanted Shaun Hill as the backup. When injuries forced Stanton into action during the 2010 season, he was the quarterback of record for victories over Green Bay and Tampa Bay. Beating the Buccaneers gave the Lions their first road victory since 2007. To summarize, Stanton walked into a horrible situation in Detroit. That situation got worse for him through no fault of his own. He later signed with the New York Jets only days before the team acquired Tim Tebow. The Jets then traded Stanton to Indianapolis right before the Colts drafted Andrew Luck. It's been one misfortune after another for Stanton. Things could be looking up for him in Arizona.
Hoyer in picture: Stanton got a three-year contract worth $8.2 million. The team previously placed a $2 million tender on quarterback Brian Hoyer, meaning any team signing Hoyer would have to send a second-round choice to Arizona if the Cardinals chose against matching.