Mark Daniel Trumbo (born January 16, 1986) is an American professional baseball first baseman and outfielder for the Baltimore Orioles of Major League Baseball (MLB). He has also played for the Los Angeles Angels of Anaheim from 2010 through 2013, for the Arizona Diamondbacks in 2014 and 2015, and for the Seattle Mariners in 2015. Trumbo was an All-Star in 2012 and 2016.

Trumbo was born in Anaheim, California and played high school baseball at Villa Park High School in Villa Park, California. Growing up, Trumbo played travel baseball against current major leaguers Phil Hughes and Brandon Barnes. At Villa Park, Trumbo was a pitcher and infielder, and was a 2005 High School All-American after hitting .425 and going 10-2 with a 2.20 ERA on the mound.

Trumbo was selected by the Anaheim Angels in the 18th round (533rd overall) of the 2004 Major League Baseball Draft. He was promoted to the major leagues as part of the September roster expansions on September 3, 2010. He made his major league debut on September 11, 2010 as a pinch hitter for Mike Napoli and then remained in the game to play first base.

Trumbo entered the 2011 season looking for some early-season playing time at first base after an excellent spring in which he displayed his over credited power. Trumbo hit his first career home run on April 12, 2011, off Fausto Carmona of the Cleveland Indians. Although he planned to be a shortstop until Kendrys Morales' returned from injury, he became the Angels' full-time first baseman for the 2011 season due to Morales' season-ending surgery. He led all rookies with 29 home runs and 87 RBIs while batting .254 in his rookie campaign, but finished second in Rookie of the Year voting to Jeremy Hellickson of the Tampa Bay Rays. Trumbo also led the American League in putouts with 1,284 in 2011.

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