Jeremy Schmidt, ESPN TrueHoop, Bucksketball.com Trade Machine: Oklahoma City sends Nenad Krstic and Morris Peterson to Golden State for Andris Biedrins and Lou Amundson Question marks dot the top of the Western Conference. The Lakers have been up and down all season. The Spurs have been breezing through the season, but have come up short in recent playoffs. With two stars seemingly at the top of their games, the time to strike may be now for the Oklahoma City Thunder. But it's hard to strike with such a middling defense and poor rebounding. Krstic isn't much of a defender or rebounder at center, and his problems are compounded playing next to Jeff Green. Biedrins would give a badly needed rebounding boost to the Thunder. The downside with Biedrins is a contract that's a bitter pill to swallow, one that would probably leave Green on the outside looking in at season's end. But Biedrins is just nearing age 25 now and could shore up the middle in Oklahoma City for a few years.