When the PDC with Houston came to an end, the Zephyrs found themselves without the tenant that they thought they'd have forever. The team underneath the Zephyrs, Nolan Ryan's Double-A Round Rock Express had done so well, they'd actually passed the Zephyrs in attendance. The Round Rock franchise was promoted to Triple-A, and the Astros made the Dell Diamond their new Pacific Coast League home. The Expos meanwhile had their Triple-A team in Edmonton. Once they moved out of Canada and into the United States, the Expos no longer needed a Canadian Triple-A team.