Wrigley Field is the site of several concerts every summer. The revenue from these shows goes directly to the Cubs’ baseball budget and doesn’t have to be shared with other teams.
The first 2017 concert was announced Monday on James Taylor’s website:
Here come the boys (and girls!) of summer — James and his All-Star Band will play four concerts at ballparks across the US in Summer 2017! Joining James and the band onstage will be special guest, the remarkable Bonnie Raitt.
In addition to the July 17 concert at Wrigley Field (when the Cubs will be in Atlanta), this ballpark tour includes Nationals Park (July 14), AT&T Park in San Francisco (July 29) and Fenway Park (August 11).
That link suggests that you can sign up on the site and have access to a presale. There is also a presale for Cubs season-ticket holders this Wednesday, November 30 at 10 a.m. CT, and the general sale will be Friday, December 2 at 10 a.m. CT.
The only thing I hope from these concerts, beyond the money given to baseball operations, is that the ballpark is properly re-sodded after the shows so that there’s no risk of injury to baseball players.