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It's possible that public comments from some of the young players over the last two years could have had an impact on chemistry.
As for the new coach, I'd look for Pax to go after an established guy. Skiles certainly got the most out of the Bulls roster the last few years, so there will be pressure to match Scott's performance.
What the new coach has going for him is a good core of young players. The question is whether Ty Thomas can become a consistent and reliable performer every night. Hinrich is another question: Can he get better or has he peaked?
I'll also be interested to see how the mid-season trade of L. Hughes and Gooden fit in with a full training camp.
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Energy guys are hard to find and can play a valuable role. Noah and Nocioni (left) both play hard and get their team extra possessions by hustling for loose balls, etc.