OAK@HOU: Martinez clobbers three-run shot in fifth

HOUSTON -- J.D. Martinez's season was in jeopardy before it began. Cast off the original Opening Day roster after Spring Training before a last-minute injury pushed him up, "run producer" wasn't a word many would have used to describe the 25-year-old outfielder.

Seven weeks later, it's the only appropriate term after an impressive surge. Martinez has popped three home runs, driven in 10 runs and hit .353 (12-for-34) over his last 10 games.

"He's really seeing the ball well, and he's a guy that definitely is developing into a productive run producer in this league," said Astros manager Bo Porter.

Martinez doesn't take the moniker lightly, but said his slow start -- which included missing 16 games in late April and early May due to a sprained right knee -- didn't slow his confidence as a power hitter. He belted a three-run homer Friday against Oakland that put the Astros ahead, 5-2, two nights after a two-run shot versus Kansas City proved to be the difference in the 3-1 win.

His 2-for-4 night Friday broke a 4-for-22 rut (.182) in six previous games this season against A's pitching. Martinez has been especially productive against right-handers, with four of his five home runs and 14 of his 17 RBIs this season coming against righties.

But Martinez said there's no magic formula or specific pitching style that's boosted his game recently.

"It's just rhythm and confidence," he said. "Every time you go up there, you know you're going to hit the ball hard. That's how guys get hot. When a guy's hitting the ball hard two to three times a game, that starts a tear. You can't manufacture it with one big swing, you have to be consistent and I'm getting there."

Corporan ready to serve as emergency third baseman

HOUSTON -- Now playing third base … Carlos Corporan?

Had the Astros forced extra innings against the A's in Friday's 6-5 loss at Minute Maid Park, Corporan, the backup catcher, would have gone into the game at third base because Matt Dominguez and Jimmy Paredes were already out of the game.

Dominguez, the starter at third, was removed in the ninth inning for pinch-runner Marwin Gonzalez, a shortstop. Ronny Cedeno started the game at shortstop but was pinch-hit for in the ninth. Paredes, who started in right and can play third, was taken out for defensive purposes in the seventh. Next man up was Corporan.

"That's why Corporan takes grounders at third every day," Astros manager Bo Porter said. "He can pick 'em, though. He has enough arm strength, and if he had to go over there, he was prepared to do it."

Corporan reminded a reporter Saturday he was actually drafted as a first baseman and also played some third before being moved to catcher during his first pro season in 2003, but he's never appeared at third in a game in the pros. He does have a first baseman's mitt and an infielder's glove in his locker.

"I have a long way to go, but as an emergency, I think I'm pretty good for a couple of innings," he said.

Astros second baseman Jose Atluve was asked if he was ready to see Corporan at third.

"No!" he joked.