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Oklahoma City also continued getting better with a really nice signing in Patrick Patterson<p>In probably the most significant free-agent deal so far (outside of Stephen Curry and Kevin Durant returning to Golden State, which was a lock all along), Gordon Hayward signed with the Boston Celtics on …

Read more at CBS Sports: http://www.cbssports.com/nba/news/ranking-best-nba-offseasons-hayward-lifts-celtics-gallinari-steadies-clippers/