Sports Celtics star Kemba Walker leaves court on stretcher with concussion-like symptoms November 22, 2019November 23, 2019Matt Eppers, USA TODAYComments Off on Celtics star Kemba Walker leaves court on stretcher with concussion-like symptoms In a scary scene, Kemba Walker collided head-first with teammate Semi Ojeleye, but the team said all scans and tests came back with positive results.