Ariza has been the most disappointing active Rockets player the last two years after Corey Brewer. The only thing good with him is his contract. He isn't good enough defensively or offensively to be a starter. He definitely is a second unit player at best but unfortunately the Rockets don't have an alternative at the moment. I personally would start Decker over him a few games to see how it works out.
Someone had a great idea to sign Matt Barnes and Larry Sanders. I'm all for Matt Barnes as a defensive specialist and can hit the three. I was really pro Larry Sanders until I read that he has been off weed for only 2 months and have proclaimed himself as rehabbed.