Deolis Alexander Guerra was born on April 17, 1989, he is a Venezuelan professional baseball pitcher for the Oakland Athletics of Major League Baseball (MLB).
He has previously played for the Milwaukee Brewers, Pittsburgh Pirates, Los Angeles Angels, and Philadelphia Phillies.
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.
On February 5, 2020, Guerra was claimed off outright waivers by the Philadelphia Phillies. On August 22, 2020, Guerra was designated for assignment by the Phillies.
In his time with the Phillies, Guerra pitched to a 1–3 record with an 8.59 ERA over 9 games. Guerra elected free agency on October 14, 2020.
On February 2, 2021, Guerra signed a minor league contract with the Oakland Athletics organization and was invited to Spring Training. On March 26, Guerra was released by the Athletics, but re-signed with the club the next day on a new minor league contract.
On April 8, 2021, Guerra had his contract selected to the active roster to take the roster spot of the injured A.J. Puk. Guerra made a career-high 53 appearances for Oakland in 2021, pitching to a 4.11 ERA with 62 strikeouts in 65.2 innings pitched.
On April 7, 2022, Guerra was placed on the 60-day injury list with a sprained right ulnar collateral ligament. On April 13, it was announced that Guerra had undergone Tommy John surgery, and would miss the entire 2022 season.
Deolis Guerra has never divulged any information about his parents, he is a very private person who likes to keep his personal life away from media attention.