We can also look at this from another perspective, let's go back to 2010-2012.
On November 16, 2010, D'Anthony Batiste was signed by the Arizona Cardinals after starting right tackle Brandon Keith suffered an injury. In 2011, he was declared inactive in 12 games and played in 4. In 2012, he started 10 games at left tackle, before being passed on the depth chart by Nate Potter.
Humphries is starting to look pretty good when you recall some of the others who have played tackle for the Cardinals. The aforementioned guys are the Yugo you traded in for that Chevy Spark in my previous post. You still paid too much for the Chevy but at least your not driving a Yugo anymore.