By Jeremy Kahn

OAKLAND-This day was supposed to be all about the two veteran pitchers Tim Hudson and Barry Zito, but it was a rookie who put on a show.

Jarrett Parker hit three home runs, including a grand slam, helping the San Francisco Giants to a come-from-behind 14-10 victory over the Oakland A’s at the Coliseum.

In the much hyped matchup between Hudson and Zito fizzled out, as Hudson lasted 1.1 innings and Zito was done after two innings.

Hudson allowed three runs on just one hit, while walking three in his short outing and Zito allowed four runs on six hits and walked a batter in his short outing. Both pitchers left to standing ovations from the Coliseum crowd.

Parker became the first Giants player to hit three home runs and drive in seven runs in a game since Willie Mays slugged four home runs and drove in eight runs on April 30, 1961 against the Milwaukee Braves at County Stadium in Milwaukee.

His grand slam off of Ryan Dull came in the top of the eighth inning after hit a solo home run off of Zito in the top of the first inning and hit a two-run home run in the top of the seventh inning off of Drew Pomeranz.

Parker is the first Giants player to hit three home runs in a game since Pablo Sandoval did it on September 4, 2013 against the San Diego Padres at Petco Park. He is the first Giants rookie to ever hit three home runs in the same game.

Josh Osich pitched two innings for his second win of the season, while Santiago Casilla shut it down for his 36th save of the season.