Yusmeiro Alberto Petit (Spanish pronunciation: [ʝusˈmeiɾo peˈtit]; born November 22, 1984) is a Venezuelan professional baseball pitcher for the Los Angeles Angels of Anaheim of Major League Baseball (MLB). He previously played for the Florida Marlins, Arizona Diamondbacks, San Francisco Giants, and Washington Nationals. In 2014, Petit retired 46 consecutive batters to set a new Major League record. He throws right-handed. As of 2016, he is the only person ever to play on winning teams in both the Little League World Series and the Major League World Series.

As a ten-year-old, Petit competed in the 1994 Little League World Series, representing the championship-winning Coquivacoa Little League team. This was the first time a Venezuelan team had won the LLWS title in eight appearances.

Petit signed with the New York Mets as an international free agent on November 15, 2001. He made his professional debut in 2002 with the Venezuelan Summer League where he went 3–5 with 2.43 earned run average (ERA) in 12 games, 11 starts.

In 2003 Petit split the season between the Rookie-Level Kingsport Mets and the Short-Season Brooklyn Cyclones. He finished third in the Appalachian League in strikeouts, fourth in strikeouts per nine innings and fifth in ERA. Petit also placed second in Appalachian League in fewest bases on balls per nine innings and allowed the second fewest runners per nine innings. He was named Pitcher of the Week for the week of July 14 to July 20. He was promoted to Brooklyn of the New York–Penn League on August 23. He recorded 20 strikeouts in 12 ¹⁄₃ innings with the Cyclones.

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