Jeffrey Alan Locke (born November 20, 1987) is an American former professional baseball pitcher.

He played in Major League Baseball (MLB) for the Miami Marlins and Pittsburgh Pirates, where he was an All-Star in 2013.

[8][9] Locke was the first selection in the second round in the 2006 Major League Baseball draft by the Atlanta Braves.

[10] Locke was assigned to the Gulf Coast Braves (Rookie League) upon signing with the organization on June 18, 2006.

On June 3, 2009, the Braves traded Locke to the Pittsburgh Pirates along with Charlie Morton and Gorkys Hernández in exchange for Nate McLouth.

[19] Locke recorded his first career win on October 1, 2012, giving up one run in six innings against the Atlanta Braves.

Despite making the 2013 All-Star team, Locke was demoted to the Pirates' Double-A affiliate Altoona Curve on August 28.

Locke was promoted from Altoona in a spot start on June 8, 2014 after Gerrit Cole was placed on the disabled list.

[22] On the first workout day of spring training, Locke said he was feeling discomfort while tossing from 60 feet away.

On June 1, 2017 Locke returned to the Marlins, and gave up one run over 5+2⁄3 innings against the Arizona Diamondbacks.

[24] Locke cleared waivers and was sent down to the Jupiter Hammerheads, the Marlins' High–A affiliate, but never pitched for the team in a game.

Locke returned to the overhead delivery during spring training in 2016, because he had gotten increasingly inconsistent results over the years by looking toward first base.