Shin-Soo Choo hit a three-run homer, Mitch Moreland added a two-run blast and Texas' dormant bats broke out in a big way as the Rangers spoiled Kendall Graveman's Oakland debut with a 10-1 victory Thursday.
Adrian Beltre and Rougned Odor added solo home runs for Texas.
After being shut out twice in the first three games of the season, the Rangers scored eight runs in the first four innings to give Nick Martinez (1-0) plenty of support and earn a split of the season-opening four-game series.
Martinez gave up four hits in seven scoreless innings, his sixth straight start with two or fewer earned runs allowed.
Graveman (0-1) had a brilliant first spring with the A's after being acquired in the offseason from Toronto in the Josh Donaldson deal. He allowed just one earned run in six starts and his 0.36 ERA was the lowest in the majors.