Updated

The Houston Astros have named Reid Ryan president of business operations.

Ryan, the son of Hall of Fame pitcher Nolan Ryan, fills the position that became open when George Postolos resigned on Monday.

"Being named president of business operations is both a homecoming and the pinnacle of my career in baseball," Reid Ryan said in a statement on Friday. "The Houston Astros have been a part of my life since 1980 when my dad, Nolan Ryan, signed with the club. I have an understanding of the history and tradition of the Houston Astros. Over the last several years, I have been fortunate to build some close relationships with many people within the Astros organization. I'm thrilled to have the opportunity to work with (owner and chairman) Jim Crane and I share his vision to rebuild the franchise."

The 41-year-old Ryan was the president and CEO of Ryan-Sanders Baseball, which owns the Double-A Corpus Christi Hooks, an affiliate of the Astros, and the Triple-A Round Rock Express, an affiliate of the Texas Rangers.

"We are thrilled to have Reid as president of the Houston Astros," Crane said in a statement. "From the beginning, Reid has been the leading force behind Ryan-Sanders Baseball and their minor league franchise operations in both Round Rock and Corpus Christi. He has built those franchises into two of the best in the country. He has also been a leader in MiLB on a national level and a wonderful community leader in both Round Rock and Corpus Christi. Reid has great knowledge of the business of baseball and will be a tremendous asset to the Houston Astros and the city of Houston."

Ryan's father pitched for the Astros from 1980-88.