ARLINGTON (June 30, 2012) -- Josh Hamilton hit a three-run homer to cap a big fifth inning, Martin Perez won his first career start and the Texas Rangers extended their winning streak to five games, beating the Oakland Athletics 7-2 on Saturday night.

Hamilton drove in four runs to help Texas (50-29) become the first team in baseball to reach 50 victories. The Rangers have won 17 of 21 games since June 8.

Oakland committed two errors in the fifth that led to five unearned runs, including a miscue from shortstop Brandon Hicks right before Hamilton came up to bat.

The 21-year-old Perez (1-0) allowed two runs and struck out five in 5 1/3 innings. The left-hander gave up six hits and walked one.

Oakland's Tommy Milone (8-6) gave up six runs - only one earned - in five innings.