The complex, to be located at Riverview Park, is not expected to be ready for the Cubs until Spring Training 2014. Work will likely begin in June. Mesa city manager Chris Brady said that the next steps will be to finalize design work on the stadium and rebuild the park.
The agreement covers how the city and the Cubs will build, maintain and pay for the facility. The city of Mesa will fund capital improvements every 10 years.
The Cubs have exclusive development options on up to six acres for a planned "Wrigleyville West" entertainment complex. Brady told the East Valley (Ariz.) Tribune that this will be the only baseball complex in the nation within a park setting.
"I think it's going to be kind of a cool environment," Brady said. "Even when the Cubs aren't playing there, it will still be a destination."
Carrie Muskat is a reporter for MLB.com. MLB.com reporter Ian Browne contributed to this report. Muskat writes a blog, Muskat Ramblings, and you can follow her on Twitter@CarrieMuskat. This story was not subject to the approval of Major League Baseball or its clubs.