MLB.com's No. 1 preseason prospect lifted a leadoff home run and scored twice in the Travelers' 5-4, 11-inning defeat to the Springfield Cardinals.
Over his past seven games, Trout is 11-for-25 with two longballs and seven RBIs.
The No. 25 overall Draft pick in 2009 hit Springfield starter Deryk Hooker's second pitch of Monday's game over the center-field fence. He leads the Travelers with six dingers.
Arkansas starter Garrett Richards allowed four runs on four hits over 6 2/3 innings, including Matthew Adams' solo shot in the sixth. Richards has yielded 10 earned runs over his past 13 innings of work.
The Travelers' Jay Brossman went deep in the ninth to retie the score. Brossman slugged his first homer of the season in Sunday's 10-6 victory.
Trout, who went 2-for-4 at the plate, had one opportunity to ignite a rally in the 10th but lined out sharply.
Springfield's Richard Castillo (1-1) silenced the Travelers again in the 11th before Jermaine Curtis' walk-off single.