Miami Heat's LeBron James grimaces after being injured during the second half in Game 4 of an opening-round NBA basketball playoff series against the Charlotte Bobcats in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Miami Heat's LeBron James grimaces after being injured during the second half in Game 4 of an opening-round NBA basketball playoff series against the Charlotte Bobcats in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Charlotte Bobcats' Kemba Walker (15) is fouled by Miami Heat's Udonis Haslem (40) during the first half in Game 4 of an opening-round NBA basketball playoff series in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Miami Heat's LeBron James (6) is fouled as he drives past Charlotte Bobcats' Bismack Biyombo (0) during the first half in Game 4 of an opening-round NBA basketball playoff series in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Miami Heat coach Erik Spoelstra gestures to his players during the first half against the Charlotte Bobcats in Game 4 of an opening-round NBA basketball playoff series in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Miami Heat's LeBron James gestures after dunking against the Charlotte Bobcats during the first half in Game 4 of an opening-round NBA basketball playoff series in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Miami Heat's Chris Andersen (11) dunks between Charlotte Bobcats' Chris Douglas-Roberts (55) and Kemba Walker (15) during the first half in Game 4 of an opening-round NBA basketball playoff series in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Charlotte Bobcats coach Steve Clifford talks to his players during the first half in Game 4 of an opening-round NBA basketball playoff series against the Miami Heat in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Charlotte Bobcats' Cody Zeller, right, falls as he is fouled by Miami Heat's Chris Andersen, left, during the first half in Game 4 of an opening-round NBA basketball playoff series in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)
Charlotte Bobcats' Gary Neal reacts after being called for a foul against the Miami Heat during the first half in Game 4 of an opening-round NBA basketball playoff series in Charlotte, N.C., Monday, April 28, 2014. (AP Photo/Chuck Burton)