Sierra Vista High has a very well developed baseball squad for being so young (10 years). They have sent 6 alumni to the minor leagues. The Mountain Lions have won one state championship (2005), and have won their division 6 times.
In 2011, the Lions finished 2nd (34-5) in their league (Class 4a Southwest League), just behind Bishop Gorman (35-4). They also won the Southwest division for the sixth time.