Conversation so far:
What did Nolan Ryan do?
Nolan Ryan's post-retirement business interests include ownership of two minor league teams.
What did he do next?
the Corpus Christi Hooks, which play in the Class AA Texas League, and the Round Rock Express, a Class AAA team in the Pacific Coast League.
Who did the teams belong too?
Both teams were affiliates of the Houston Astros, for whom Ryan also served as a special assistant to the general manager.
What does this lead too?
until selling his interest in the team in the off-season between 2004 and 2005.

Question: what did he try next?
Self-contained rewrite: What did Nolan Ryan try after he sold his interest in his two minor league teams?