Luis Javier Guerra (born October 31, 1985) is an American former professional baseball pitcher.

In the Dodgers system he pitched for the Columbus Catfish in 2005, Ogden Raptors in 2006, Inland Empire 66ers of San Bernardino from 2007–2008 and split 2009 between the Great Lakes Loons and the Chattanooga Lookouts.

On May 24 he was credited with his first career save by pitching a scoreless ninth inning against the Houston Astros.

On June 4 he earned his first win by pitching the tenth inning and part of the eleventh, allowing one run in an 11-8 victory against the Cincinnati Reds; he also batted for himself and drew a base on balls.

Guerra began 2012 as the Dodgers closer and picked up saves in his first five chances and seven of his first eight, but then he went through a period where he blew two of his next three opportunities and also pitched poorly in some non-save appearances.

[2] Guerra rejoined the Dodgers when rosters expanded in September, but suffered a strained oblique and was placed on the disabled list for the remainder of the season.

[4] He returned in time for spring training, but his injury kept him from participating in the 2013 World Baseball Classic.

[5][6] He also suffered a groin strain during spring training and the setback led to him falling behind the other relievers and he was optioned to Albuquerque to start the season.

[16] On January 10, 2019, Guerra signed a minor league contract with the Toronto Blue Jays.

[18] He was designated for assignment on April 18 to make room for Ryan Tepera who was activated from the 10 day injured list.

[citation needed] Guerra pitched the ninth inning of Game 2 of the World Series, allowing a solo home run to Martín Maldonado in a 12-3 Nationals win over the Houston Astros.

[29] On August 24, Guerra cleared waivers, but rejected his outright assignment and elected free agency.

[32] Guerra made 43 relief appearances for Tijuana the following year, registering a 2–4 record and 5.77 ERA with 25 strikeouts across 34+1⁄3 innings pitched.

[33] Guerra mostly throws a hard four-seam fastball (93–96 mph) and cutter (88–91), although he occasionally mixes in a curveball (78–80).