Houston Rockets All-Star guard James Harden has agreed to a four-year, $118 million renegotiation that could keep him under contract through 2020, league sources told The Vertical. The deal assures the Rockets of one additional year of Harden under contract in 2018-19 because of a player option that could return him to free agency in 2019, sources said. Rockets owner Leslie Alexander made the surprise announcement at a news conference in Houston on Saturday, where the Rockets had planned to introduce the new free-agent signings of Ryan Anderson, Eric Gordon and Nene. A provision in the collective bargaining agreement allows Houston to use its own salary cap space to renegotiate the final two years of Harden’s contract – and add two additional years onto the deal. - See more at: http://sports.yahoo.com/news/sources--james-harden-172817615.html