Mariners, Rangers open series with duel of aces

All signs point to a pitchers' duel when the Texas Rangers open a three-game series against the Seattle Mariners on Friday in Arlington, Texas.

Both starters -- Rangers right-hander Jon Gray (5-1, 2.81 ERA) and Mariners righty Luis Castillo (4-2, 2.69) -- rank among the top 15 ERA leaders in baseball.

Gray will make his 11th start of the season. He threw seven innings of one-run ball in his previous start, a 12-2 victor