Kyrie Irving was tired of being teammates with LeBron James.
Now he has to figure out how to beat him.
Cleveland's All-Star guard, who asked owner Dan Gilbert to trade him earlier this summer, was dealt Tuesday night to the Boston Celtics for fellow All-Star Isaiah Thomas, forward Jae Crowder, center Ante Zizic and the Brooklyn Nets' unprotected 2018 first-round draft pick.
"It's extremely rare to trade for a 25-year-old player that's done what he's done, the offensive weapon that he is," Celtics president Danny Ainge said. "We feel like his best basketball is still ahead of him.
"We have a player that's proven to be a sure thing. We know...