Walker went 2-for-4 in Tuesday's series opener against the Astros, and has hit safely in each of his last 10 road games, going 15-for-41 with nine RBIs in that span.
"We feel like soon ... the pitching will continue to keep doing what it's doing, and our offense is going to match that," Walker said. "When that happens, you're looking at some blowouts."
Walker has hit safely in 17 of his last 18 road games since May 2. His second-inning run on Tuesday night gave the Pirates and Jeff Karstens all they needed to secure a victory.
"I just wanted to get on base and see what would happen, and fortunately I ended up on second with nobody out," Walker said, "and Garrett Jones got himself in a 3-0 count and put the ball in play. It's nice to get those hits to start things off."