Darío Rafael Álvarez Espinal (born January 17, 1989) is a Dominican professional baseball pitcher who is currently a free agent.

He has previously played in Major League Baseball (MLB) for the New York Mets, Atlanta Braves, and Texas Rangers.

[1] On January 13, 2013, Álvarez was signed a minor league contract with the New York Mets organization after spending the 2010 through 2012 seasons out of baseball.

Álvarez began the 2015 season with Binghamton, and after being named a mid-season All-Star, he was promoted to the Triple-A Las Vegas 51s.

Álvarez was recalled to the majors on August 22 when first baseman Lucas Duda was placed on the disable list with a back injury.

[8] On September 7, Álvarez earned his first career win against the Washington Nationals by striking out outfielder Bryce Harper in the bottom of the 6th inning.

[9] On September 15, Álvarez strained his groin with one out in the eight inning against the Marlins forcing him to leave in what would be a 3–9 loss for the Mets.

[10] On September 18 it was revealed that Álvarez was headed to Port St. Lucie to rehab the groin injury he had sustained three days ago and that it was unlikely for him to pitch again in 2015.

On July 27, 2016, the Braves traded Álvarez and Lucas Harrell to the Texas Rangers in exchange for Travis Demeritte.

[21] On April 25, Álvarez was outrighted off of the 40-man roster without appearing in a game for Seattle and was assigned to the Triple-A Tacoma Rainiers.