O.J. Mayo arrives in Dallas with a lot to prove. Mayo, who signed his two-year contract with the Mavericks on Thursday, didn’t develop into the franchise cornerstone for the Memphis Grizzlies many people expected him to be after he was the third overall pick in the 2008 draft and was the runner-up to Chicago’s Derrick Rose in Rookie of the Year voting. His statistics dropped significantly the last two seasons, when he transitioned into a sixth-man role for the Grizzlies.
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