The Oakland Athletics' 2005 season was their 37th in Oakland, California. It was also the 105th season in franchise history. The team finished second in the American League West with a record of 88-74. The 2005 season also saw Athletics closer Huston Street win the American League Rookie of the Year Award. Street earned the honor after posting a 1.72 earned run average in his first major-league season; he did so while recording 23 saves. The Rookie of the Year Award was Oakland's second in as many years (and sixth overall).