Deolis Alexander Guerra (born April 17, 1989) is a Venezuelan professional baseball pitcher for the Los Angeles Angels of Anaheim of Major League Baseball (MLB). He previously played for the Pittsburgh Pirates.

Guerra signed with the New York Mets as a non-drafted free agent on July 2, 2005. He was named South Atlantic League Pitcher of the Week on July 30, 2006. On July 8, 2007, Guerra represented the New York Mets' organization for the World Team in Major League Baseball's All-Star Futures Game.

Along with outfielder Carlos Gómez and pitchers Philip Humber and Kevin Mulvey, Guerra was traded to the Minnesota Twins for Johan Santana on January 29, 2008.

With the Fort Myers Miracle, he compiled a 7–2 record with a 4.83 earned run average in the first half of the 2008 season—helping his team capture the Florida State League (FSL) first-half West Division title. Guerra's first start in the second half of the 2008 season (Tuesday, July 1) was a 4–0 complete game shutout of the Tampa Yankees. He allowed only three hits, and retired 19 in a row between a first inning single by James Cooper and a one-out single by Andres Perez in the seventh. It marked the first shutout of Guerra’ professional career. For the second half, he went 4–7 with a 6.08 ERA in 13 starts.

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