Enny Manuel Romero Hernandez (born January 24, 1991) is a Dominican professional baseball pitcher in the San Francisco Giants organization.

Starting the 2016 season, Romero retired 17 consecutive batters across relief appearances to set a franchise record for the Rays.

[5] Romero notched his first career save on August 25, 2016, striking out slugger David Ortiz to seal a Rays victory over the division rival Boston Red Sox.

[7] The Rays traded Romero to the Washington Nationals for minor league pitcher Jeffrey Rosa on February 7, 2017.

Romero made 20 appearances for Lotte during the 2022 season, compiling an 8–9 record and 3.36 ERA with 77 strikeouts across 115+1⁄3 innings pitched.

[25] Romero's main weapon is a blazing fastball, which he threw in the high 90s while in the Tampa Bay Rays organization but which began routinely hitting the century mark in 2017, beginning at the World Baseball Classic.

[7] In a July 2017 game with the Washington Nationals, Romero hit 102 miles per hour (164 km/h) with his fastball in a strikeout of Atlanta Braves star Freddie Freeman.

[27] Perhaps the most notable drawback in Romero's game throughout his professional career has been a lack of command, with a high walk rate coloring his time in Tampa Bay.

During 2017 spring training with the Nationals, a MASN Sports beat reporter noted that he appeared to have made adjustments allowing him to better locate his pitches,[9] and Romero exhibited improved command into the 2017 season.