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Members of the Clayton Valley Charter High School show choir hi-five the Rollie Fingers character before the start of their game against the Houston Astros at O.co Coliseum in Oakland, Calif., on Friday, April 18, 2014. (Jose Carlos Fajardo/Bay Area News Group)

Oakland A's mascot Stomper high-fives members of the Clayton Valley Charter High School show choir from Concord after they perform the national anthem at the start of the A's game against the Houston Astros on April 18, at O.co Coliseum. The choir, under the direction of Elizabeth Emigh, above, along with the crowd, watched as the A's got seven runs in the first inning of the game, including two homers, to run away with a win, 11-3.

JOSE CARLOS FAJARDO/Staff photos