CLEVELAND --? Celtics forward Gordon Hayward was stretchered off the floor in Cleveland after suffering a horrific-looking left leg injury little more than five minutes into his Boston debut Tuesday night.? Hayward's left leg bent awkwardly as he landed under the Celtics basket with 6 minutes, 45 seconds left in the first quarter. Teammates and Cavaliers players including LeBron James rushed to check on Hayward as he was stretchered from the court. Hayward's left ankle turned at such an odd angle that teammates stood in shock as he motioned for help from the sideline. Cavaliers guard Dwyane Wade knelt win his hand on his head nearby as team doctors attended to Hayward. Shell-shocked Celtics players huddled, with Kyrie Irving burying his head in the chests of teammates Marcus Smart and Jayson Tatum. Fans gave Hayward a standing ovation as he was taken from the court with his entire left leg immobilized in an air cast. He was...