Guerrero wound up appearing in 152 games with a batting average of .300, 29 home runs and 115 RBIs. He earned a Silver Slugger Award in the regular season for a Texas Rangers club that wound up winning its division and ultimately, the first pennant in Rangers history. He also won the Edgar Martínez Award and earned his ninth invitation to the All-Star Game. On October 22, 2010, Guerrero drove in 3 runs during game 6 of the American League Championship Series against the New York Yankees, capturing the first American League pennant for the Texas Rangers. The Rangers would go on to lose the World Series to the San Francisco Giants in five games. On November 3 the Rangers declined to pick up Guerrero's 2011 option making him a free agent.