Carlos Lee, the Astros' starting left fielder, was in the lineup as the designated hitter.
"With those guys out there, you're getting very athletic," Astros manager Brad Mills said. "They can do some things."
Bourgeois, who appeared in his 12th Major League game Friday, worked on all three outfield positions with third-base coach Dave Clark during Spring Training. He played left field for a couple of innings in Thursday's series finale against the Giants.
"We've got a chance to cover a lot of ground," Bourgeois said. "It's a pretty big outfield, so I'm looking forward to the challenge."
But when it comes to covering ground, Bourgeois will follow the lead of Bourn, a Little League teammate growing up in Houston.
"He had the priority out there," Bourgeois said. "He controls the field. He's got the Gold Glove. You might want to listen to him."