Round Rock Express vs. Las Vegas Aviators is a Triple-A baseball matchup at Dell Diamond in Round Rock, just outside Austin. Dell Diamond is a classic minor league ballpark, so you get a close-up view of the field and an easygoing, friendly crowd. Grab a seat, cheer on the home team and enjoy the warm summer nights that come with a ballgame. Bring the whole crew, catch up with friends and soak up the fun of a day or night at the ballpark.