In Tuesday's win over Las Vegas, Johnson went 1-for-4 with a homer, Bourgeois was 2-for-5 with an RBI and Bogusevic was 3-for-5 with two runs and an RBI. Infielder Matt Kata went 4-for-4 with three RBIs in the game.
Astros assistant general manager Ricky Bennett said Minor League field coordinator Dick Scott is in Round Rock watching the Express and raved about Bogusevic and Johnson.
"Compared to where he was a month ago when Dick last saw him, he said Bogusevic is really, really making a lot of progress offensively," Bennett said. "He's hitting the ball to all parts of the field and is really driving the ball. He's got better plate coverage and he's making a lot of progress.
"C.J. is swinging the bat well, too. Having that injury [right intercostal strain] early in the season, it kind of slowed him down, but now he's got some at-bats under his belt and he's starting to put things together like he did in Spring Training."
Bennett said Bogusevic and Johnson have put themselves in position for callups down the road.
"That's something we've talked about here recently," Bennett said. "I don't think we're at the point yet, but if they continue to make progress the next month to six weeks, we have to give them consideration to have an opportunity to play here."