Esmerling de Jesús Vásquez (born November 7, 1983) is a Dominican former professional baseball pitcher. He played in Major League Baseball (MLB) for the Arizona Diamondbacks and Minnesota Twins and in Nippon Professional Baseball (NPB) for the Saitama Seibu Lions.

Career

Arizona Diamondbacks

Vásquez signed as an undrafted free agent in 2003 by the Arizona Diamondbacks. Vásquez played for the Double–A Mobile BayBears in 2007. He started in all 29 games he played in and went 10–6 with a 2.99 ERA. Following the season, the Diamondbacks named Vásquez as their minor league pitcher of the year. On November 20, 2007, the Diamondbacks added Vásquez to their 40-man roster to protect him from the Rule 5 draft. Vásquez was promoted to the major leagues for the first time on April 26, 2009, and made his major league debut later that day. Vásquez was demoted to the Triple–A Reno Aces on April 17, 2010, to make room for Kris Benson but was recalled 2 days later after Conor Jackson suffered an injury. On May 31, Vásquez committed a balk in the bottom of the ninth against the Dodgers, allowing Casey Blake to score the winning run. The event was known as a "balk-off". In his career with the Diamondbacks, Vásquez went 5–10 with a 4.66 ERA in 141 games with a 1.496 WHIP.

Minnesota Twins

Vásquez was claimed off waivers by the Minnesota Twins on September 27, 2011. He did not pitch for the Twins that year. Vásquez spent most of 2012 with Triple-A Rochester, where he went 9–6 with a 2.78 ERA in 31 games, 8 of them starts. Called up on September 1, Vásquez went 0–2 with a 5.68 in 6 starts for the Twins. On November 5, Vásquez signed a minor league deal with the Twins. On June 23, 2013, the Twins released Vásquez.

EDA Rhinos

Vásquez signed with the EDA Rhinos of the Chinese Professional Baseball League for the 2014 season.

Saitama Seibu Lions

On November 14, 2014, Vásquez signed with the Saitama Seibu Lions of Nippon Professional Baseball.

Algodoneros de Unión Laguna

On July 19, 2018, ásquez signed with the Algodoneros de Unión Laguna of the Mexican League.

Texas Rangers

On March 10, 2019, Vasquez signed a minor league contract with the Texas Rangers organization. In 12 games (8 starts) split between the Double–A Frisco RoughRiders and Triple–A Nashville Sounds, he accumulated a 5.86 ERA with 17 strikeouts across 35 1/3 innings pitched. Vásquez became a free agent following the season on November 4. On March 14, 2020, Vásquez re-signed with the Rangers on a new minor league contract. He did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic. Vásquez became a free agent on November 2.