Bill Russell changed the way the game was played, as never before had the NBA had such a dominating big man. He worked more on the defensive side of the ball than on his offensive skills, because he knew there were plenty of shooters but not enough players willing to do the dirty work. Russell was a defensive force with his height, ability to jump, and speed. His presence caused teams to alter their strategies, and ultimately led to rules being changed to put the other players on more of a level playing field. Russell's abilities won him many awards during his playing career, including 5 MVPs and 12 All-Star appearances.