Donnie Nelson says the Mavs would prefer to keep Shawn Marion instead of trade him at the Feb. 21 deadline. Marion recently said he wants to play for a winning team and would not report if traded to a bad team at the deadline. "The fact that Shawn [Marion] recently expressed an interest to stay here, well it's mutual," Nelson told reporters Saturday morning. Marion is unlikely to be traded considering his high salary, age and the 15-percent trade kicker built into his contract.