Jesús Castillo (baseball)

Jesús Ronaldo Castillo Rojas (born August 27, 1995) is a Venezuelan professional baseball pitcher who is a free agent.

Arizona Diamondbacks
Castillo signed with the Arizona Diamondbacks as an international free agent in 2011. He spent the 2012 season with the DSL Diamondbacks, going 2–4 with a 5.40 ERA over $46 2/3$ innings.

Chicago Cubs
On February 18, 2013, Castillo and Erick Leal were traded to the Chicago Cubs in exchange for Tony Campana. He spent the 2013 season with the VSL Cubs, going 0–2 with a 4.26 ERA over 19 innings. He played for the AZL Cubs in 2014 and 2015, going 1–0 with a 2.67 ERA over $30 1/3$ innings in 2014 and going 1–2 with a 4.58 ERA over $19 2/3$ innings in 2015.

Los Angeles Angels
On August 1, 2016, Castillo was traded to the Los Angeles Angels in exchange for Joe Smith. He split the 2016 season between the Eugene Emeralds and the Burlington Bees, going a combined 5–5 with a 2.87 ERA over $62 2/3$ innings. He split the 2017 season between Burlington, Inland Empire 66ers, and the Mobile BayBears, going a combined 9–6 with a 3.32 ERA over $124 2/3$ innings.

The Angels added Castillo to their 40-man roster after the 2017 season to protect him from the Rule 5 draft He spent the 2018 season with Mobile, going 9–5 with a 4.94 ERA over $98 1/3$ innings. Castillo was designated for assignment on March 27, 2019, and outrighted on March 31. He spent 2019 with Mobile, going 6–6 with a 2.71 ERA over $99 2/3$ innings. He became a free agent following the 2019 season.

Milwaukee Brewers
On November 23, 2019, Castillo signed a minor league contract, with an invitation to major league spring training, with the Milwaukee Brewers. He did not play in a game in 2020 due to the cancellation of the minor league season.

In 2021, Castillo made 26 appearances (19 starts) split between the Double-A Biloxi Shuckers and the Triple-A Nashville Sounds. In 105.2 innings of work, he registered a 5-9 record and 4.94 ERA with 71 strikeouts. He elected free agency following the season on November 7, 2021.

San Marino Baseball
On July 14, 2023, Castillo was signed by San Marino Baseball Club of the Italian Serie A.