Coincidentally, the Astros were facing the Brewers at Miller Park on Monday, with Martinez in the lineup facing -- you guessed it -- Estrada, who was starting for Milwaukee.
"I was nervous, excited, there was a lot of adrenaline," Martinez said about his Major League debut. "I was shaking in the box because of the adrenaline."
Martinez took a curveball away for a strike before crushing an Estrada fastball down the middle for a double to center field to score Humberto Quintero. Martinez wound up driving in 28 runs in August, but his career has been a mixed bag since.
With a year under his belt, he entered Monday hitting .256 with 17 homers and 88 RBIs in 147 career games.
"There's been ups and downs, but it's been fun and I've been learning," he said. "That's the biggest thing, is trying to get better. You can learn something every day."