Nolan Ryan is stepping down as Texas Rangers CEO on Oct. 31.
The club made the announcement in a press release sent out Thursday afternoon and Ryan explained his decision at press conference.
"This closes a chapter of my life in baseball. I feel like it's time for me to move on to other things," Ryan said. "It's a decision that's weighed on me heavily."
Ryan said his sometimes strained relationship with Rangers President Jon Daniels didn't factor into his decision to resign.
"My relationship with Jon is good and it didn't come into play with this," Ryan said.
Rangers co-owner Bob Simpson said he's disappointed and didn't want Ryan to leave.
"I've tried every way I can to talk him out of it over the last few days," Simpson said. "I just couldn't get it done."
Simpson admitted there could be some backlash from fans due to Ryan leaving.
Ryan carefully worded a denial of any plans to join another team. Ryan has previously done work with the Houston Astros and his son is currently in the Astros' front office.
"Will I be a CEO of another major league ball club? No, I won't," Ryan said.
Ryan became the tenth president of the Rangers in 2008 and was named CEO of the club in 2011.