In 2008 and 2009, Kevin Kouzmanoff posted 2.7 WAR seasons for the San Diego Padres. In 2007, his WAR was 2.5. This season, the Oakland Athletics have played 115 games, and Kouzmanoff has compiled 1.8 WAR. If he were to continue his pace, Kouzmanoff would end the year with 2.5 WAR.
Kouzmanoff is an incredibly average third baseman. Padres fans might remember Kouzmanoff as prone to extended slumps, but year after year, he has put up league average performances. I have not done the research, but in terms of WAR, Kouzmanoff might just be the major’s most consistent players.