Trying to find further confirmation but they're reporting it over on the Insidehoops forum:

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I don't get this. We just let Solomon Jones walk and Sheed may have broken down again last night...Don't we need a big man more? Chandler/Martin/Camby must all be doing better. And maybe Sheed's ok and we can chalk up last night to regular post-surgery soreness. Where's he playing -- not over Shump and JR and we know Melo's gonna be going 35-40 mins a night. Plus I want Copeland playing. If Q-Rich eats into Cope's mins. I'm gonna be pissed. Cope needs to play. Isn't that why we have James White -- as an emergency swingman??? Not sure I understand this signing.