Robin Williams' Kids Honor Their Dad at San Francisco Giants Game

Robin Williams' children declare, "Play ball!"

The late actor's kids, Zak, Zelda and Cody, showed up on the mound at AT&T Park on Sunday, Oct. 25, for game 5 of the World Series. Before the San Francisco Giants took on the Kansas City Royals, Zak Williams threw out the ceremonial first pitch, while Robin's pal Billy Crystal -- who also paid tribute to his close friend at the Emmys -- was ready behind home plate to play catcher.

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Crystal seemed quite impressed with Zak's arm, tweeting: "Caught first pitch strike thrown by Zak Williams Robins son.Fans showered him with love."

Robin was a huge Giants fan, and in 2010, he even rallied the crowd for the team.

The Oscar winner was such a Giants supporter that when news broke of his death on August 11, Giants president Larry Baer released a statement on behalf of the team. "We were deeply saddened to learn of the death of Robin Williams. Robin was a true artist who brought joy to the world through his brilliance, humor, talent and love for our community," Baer said. "We lost one of our greatest fans today and he will be deeply missed by the Giants family. Our thoughts and prayers are with Robin’s family and the entire community during this difficult time."

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Prior to the first-pitch tribute, the Giants tweeted out a picture of a baseball jersey with Williams' name on the back. "Tonight we honor our dear friend Robin Williams during pregame #SFGiants," the tweet reads.

Robin would have loved Sunday's game. The Giants beat the Royals 5-0.

The actor died of suicide this past August in his California home at age 63. Here's ET's tribute to the beloved star.