Ronald José Herrera Aular (born May 3, 1995) is a Venezuelan professional baseball pitcher who is a free agent.

[2] His 2013 season was split between the Rookie-level Arizona Athletics and the Low–A Vermont Lake Monsters, accumulating a 7–4 record with a 4.02 ERA in 77 innings.

[2] On May 28, 2014, the Athletics traded Herrera and Jake Goebbert to the San Diego Padres in exchange for Kyle Blanks.

[2] In 2015, he split the season between the High–A Lake Elsinore Storm and the Double-A San Antonio Missions, accumulating a 8–7 record with a 4.08 ERA in 145.2 innings.

[2] On April 26, 2016, Herrera pitched eight innings of a joint no-hitter for the Trenton Thunder, with Jonathan Holder completing the game.

[10][11] Herrera started the 2019 season on the injured list with the Triple-A Nashville Sounds as he recovered from shoulder surgery.