Armstrong, 53, founded Green Day in 1987 with Mike Dirnt. The band has sold more than 85 million records worldwide and has won four Grammy Awards. Armstrong also won a Grammy for Best Musical Show Album for “American Idiot,” which also featured Green Day.

The privately owned club — it was founded by former head of comedy at Fusion Bryan Carmel and his Oakland boyhood friend and edtech entrepreneur Paul Freedman, with the help of outside investors — offered fans a chance to join a $1.2 million financing round last year. Some 2,200 of them signed up. A $2 million round is planned for this year.

Green Day frontman Billie Joe Armstrong and rapper Too $hort are attempting to keep baseball alive in the Bay Area. The music icons are joining the ownership group of the Oakland Ballers, a new independent team attempting to keep baseball alive in the city.

Billie Joe Armstrong is going from "American Idiot" to America's pastime. The Green Day frontman has joined the ownership group for the Oakland Ballers baseball

Now the only professional baseball team in the East Bay, the Oakland Ballers also received an investment from Too $hort. Billie Joe Armstrong Buys Stake in Oakland Minor League Baseball Team Eddie Fu

Billie Joe Armstrong of Green Day and rapper Too $hort are joining the ownership group of the minor league baseball team Oakland Ballers. After the A’s left for Las Vegas, there was a hole to fill in Northern California’s East Bay.