Lenny Dykstra’s mouth is going into extra innings.

The former Mets player appeared at the Gramercy Theatre on Wednesday night to promote his new memoir, “House of Nails: A Memoir of Life on the Edge,” and regaled the crowd with even more salacious stories about his ballplayer buddies.

One hot topic: Darryl Strawberry’s gargantuan genitals.

“That guy was hung like a swamp mule. He had a hammer from hell. It was traumatizing,” he said.

Dykstra’s own genitals were never far from his mind. Playing in the Big Apple was so “electric,” it would give him an erection when he stepped up to bat.

“I would get hard when I played in New York,” Dykstra admitted.

Dykstra also dished more about his newest gig as a gigolo, which he first revealed on “The Howard Stern Show,” admitting there are three “grannies” he “provides companionship” to.

“It’s 15 dimes a pop with these Beverly Hills widows, it’s kind of hard to say no,” Dykstra told fans.

He claims he doesn’t actually have sex with the women, noting they’re 80 years old and “their bones are brittle.”

“We’re talking about a gray bush,” Dykstra said.

Dykstra also mentioned the baseball Hall of Fame, expressing frustration that players who’ve used steroids can’t be selected.

“How can the three best baseball players in history not be in the Hall of Fame? Roger Clemens, Pete Rose and Barry Bonds.”

Clemens and Bonds famously took steroids and were barred from the Hall of Fame. Rose was banned from baseball after his gambling problem got so bad, he started betting on his own team.

“The Hall of Fame was supposed to be about what you did on the field. Now it’s about if you were a good husband,” Dykstra complained.

He admits in his book he never would’ve achieved the success he had without using steroids himself:

“Now, I don’t want to come off as a bad example for the kids or anything, but I have to share three facts with you. One: I would go on to lead the Phillies to the World Series. Two: I would go on to make millions of dollars and live the dream of every boy and man in America. Three: I could not have done One and Two without using steroids,” Dykstra wrote in the memoir.

His memoir was released Wednesday and became the No. 1-selling baseball book on Amazon by the end of the day.

He told fans “I hung my balls out” for the book and spilled “blood on the keyboard” while writing it.

“It’s real, it’s raw, it’s sad and it’s happy and it’s called a life.”

“If I could do it again, I’d do it the same f—ing way.”