Call it Mike and the Sports Guy.

Bill Simmons will join Mike Francesa as a co-host on Francesa’s WFAN radio show for one day in May, Simmons announced on Twitter Tuesday evening.

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“It’s true — I’m co-hosting Mike Francesa’s show with him for an entire day next month. 5 hours of yuuuge yuuuuge entertainment,” Simmons tweeted.

No date for the show was announced.

Simmons, whose contract was not renewed by ESPN last September, is close with Francesa. Francesa approached Simmons about co-hosting after Chris “Mad Dog” Russo’s departure — Simmons was under contract to ESPN at the time and couldn’t accept the offer — and Simmons joined Francesa on the air for a segment last October.

Simmons just launched his new website “The Ringer” and will have his own weekly talk show on HBO later this year.