No concerns at right tackle. He had a stellar performance there last season in absense of Havenstein.
Let's not even mention/discuss Humphries as an option anywhere he was so bad.
The Rams got destroyed that game. Cardinals beat them something like 40 to 10. I brought the whole family to the game, like 6 of us. Great seats behind the Rams bench about 12 rows up from the field. Many plays that day I had a clear view of McClendon, and it was miserable to watch him at left tackle. Like I mentioned, gave up 3 sacks in the FIRST HALF alone. Couldn't seem to block and was basically man-handled all game long. Very similar to the Humphries disaster last season.
McClendon has totally proven himself, over a full season, to hold his own at right tackle. Your suggestion to move him to left tackle just brought back these horrendous memories of his Cardnials game, and those memories jump out at me as a hell no at left tackle.