Boston Celtics big man Al Horford has turned down his 2019-20 player option and will become an unrestricted free agent on July 1, Adrian Wojnarowski of ESPN reports. Horford hitting the open market doesn’t preclude the center from returning to Boston. He could still technically leave money on the table in 2019-20 but land a […] The post Al Horford Turns Down 2019-20 Player Option, Will Become Free Agent appeared first on SLAM.