Gregg Popovich said that the Spurs' No. 1 personnel goal is to add another center to the roster. San Antonio has an obvious lack of true centers, especially given the likely retirement of Antonio McDyess and the slow development of Tiago Splitter. The Spurs' main problem is that they're in the luxury tax and can only offer "a deal starting at $3 million." That limits them to guys like Alexis Ajinca and injured Kyrylo Fesenko, so expect them to roll with their current personnel -- DeJuan Blair, Matt Bonner, Splitter and Duncan.