NBA concussion policy - Article Photos 4/11

FILE - In this Dec. 9, 1977, file image made from a television frame, Los Angeles Lakers' Kermit Washington, right, throws a punch to the jaw of Houston Rockets' Rudy Tomjanovich during an NBA basketball game in Los Angeles. Lakers and Rockets players scuffle at left as an official steps in to separate them. Tomjanovich was hospitalized from the injuries suffered from the blow. The hit was speculated to stand among the worst in league history. (AP Photo/NBC-TV, File) ORG XMIT: NY152