Can't assume that's true, since WAR goes up and down during a season, not just up. Only thing you can say is if he continued to perform exactly the same way, he would have had about 2.1 WAR, but that assumes he would have performed exactly the same way. Still, a WAR at 2.1 is nice (especially for rookie), but that is just barely considered a solid starter as opposed to a role player (2-3=solid starter, 1-2=role player).