The Houston Astros scored two runs off Stephen Strasburg in the first inning of Game 6 and the right-hander believes he may know why.

Strasburg said after the game, which the Washington Nationals won, that he believes he might have been tipping his pitches in the first inning.

"That's something that over the years you tend be a little more paranoid about it," he said. "Sometimes you do it, sometimes you don't. I just decided to switch it up a bit, and [it] seemed to work in my advantage."

Strasburg said he started shaking his glove so the Astros wouldn't know what he was throwing. He shut down Houston's offense over the next 7 1/3 innings.

"It's something that has burned me in the past, and it burned me there in the first," Strasburg said. "It's just a part of the game, and you gotta do your best to stay consistent in your delivery on each pitch."