Astros outfielder J.D. Martinez hit cleanup Monday night in Seattle. He hit in the four hole 32 times last year, reports MLB.com.

"I've always considered myself a heart-of-the-order-type hitter," he said. "I've always been that since the first time they put me in when I first got called up. I played one game in the six-hole and the next day I was in the three-hole or four-hole. I'm comfortable hitting here. I like it more because there's guys on base more. You're in more of an RBI spot and a pressure spot."

Martinez entered Monday's game having gone 3 for 8 in his first two starts after starting the year 0 for 3 as a reserve in Houston's first three games.

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