Ross Detwiler had pitched well through four innings Monday. But Adrian Beltre crushed a grand slam to power the Rangers past the A's, 5-2, in Texas.
The A's jumped out to a 2-0 lead after two innings. In the first, Billy Butler singled to left, bringing home Marcus Semien, who started the game by reaching on an error.
In the second, rookie Ryon Healy led off with a home run, his sixth of the season.
The Rangers got one run back in the fourth on an RBI-single by Elvis Andrus.
In the fifth, Detwiler hit Shin-Soo Choo to begin the inning.