Toronto Blue Jays outfielder Jose Bautista also won for a third time after taking the honours in 2010 and 2011 as well.
Chicago White Sox rookie first baseman Jose Abreu and Houston second baseman Jose Altuve were among eight first-time winners announced Thursday by Louisville Slugger, which presents the annual honours following voting by major league managers and coaches for the top hitter in each league at every position.
Texas third baseman Adrian Beltre won for the fourth time and was joined on the AL team by White Sox shortstop Alexei Ramirez, Cleveland catcher Yan Gomes and Detroit designated hitter Victor Martinez. Trout joined Mike Piazza (1993-95) as the only players to win in each of their first three full big league seasons and was joined in the outfield by Bautista and Cleveland's Michael Brantley.
The NL team included Los Angeles Dodgers first baseman Adrian Gonzalez, Pittsburgh second baseman Neil Walker and Washington's left side of the infield, with Desmond at shortstop and Anthony Rendon at third. McCutchen was picked in the outfield along with Miami's Giancarlo Stanton and Atlanta's Justin Upton. World Series champion San Francisco earned battery honours, with Madison Bumgarner winning at pitcher and Buster Posey at catcher.
Brantley, Bumgarner, Gomes, Rendon, Stanton and Walker also were first-time winners.
Beltre, Gonzalez and Martinez each earned $100,000 bonuses; Trout $75,000; Brantley, Bumgarner and Posey $50,000 apiece; Altuve $25,000; and Abreu and Ramirez $15,000 each.