Still very much in season

Not that Frankie Valli, 75, would ever dare to compare himself to his idol. But the face and main voice of the Four Seasons is reveling in the surprising third act revitalization of his career in the wake of the Tony-winning smash “Jersey Boys.’’ The show not only rekindled worldwide interest in Valli and the Seasons - who never stopped touring but recorded only intermittently over the past 25 years - but helped corral the group’s music into a single jukebox in listener’s minds. Valli and the current incarnation of the Four Seasons (the membership has changed over the years) bring that jukebox to the Citi Wang Theatre Saturday.

“It’s really amazing that for many, many years - because we had recorded in so many different ways - that most people didn’t even realize it was all coming from the same people,’’ Valli says on the phone from Los Angeles. Post-musical, he says he’s heard a familiar mantra: “Oh jeez, he did that one? And that one? And that one?’’

Yes, he, and they, did. With the Four Seasons and in his concurrent solo career, Valli went from the falsetto highs of the early ’60s (“Sherry,’’ “Big Girls Don’t Cry,’’ “Walk Like a Man’’) to the lower-pitched smashes of the latter-part of the decade (“Can’t Take My Eyes Off of You’’) to disco-era hits such as “My Eyes Adored You,’’ “December 1963 (Oh, What a Night),’’ and the theme to “Grease.’’ The group had a hit as recently as 2007 when a remix of ’60s song “Beggin’ ’’ was a club smash in the UK.

That’s only a partial sampling of what is a pretty impressive list, especially given that Valli didn’t even realize he had something special at first.

“I started to do this and I thought everybody could do it,’’ Valli says of his dynamic baritone to falsetto range. “I had no true musical education on a formal level. I just liked to sing and do impressions and I found that I could do all these different voices.’’

“That voice is not easy to replicate,’’ says John Lloyd Young, who should know since he won a best-actor Tony for his portrayal of Valli in the original 2005 Broadway production of “Jersey Boys.’’ The show now has multiple touring productions around the globe. “Frankie had his entire career to sing his entire career, and now these kids playing Frankie have to sing his entire career in two and a half hours - it’s a steep challenge.’’

Valli says he has been amazed and humbled by the response to “Jersey Boys,’’ since he wasn’t sure how it would be received.

“What I really knew, if there was anything at all, was that we had a unique story,’’ he says of the group’s hardscrabble beginnings, amazing success, and painful tribulations, including deaths and run-ins with the law. He worried about how the public would handle the gritty tale but observes: “In today’s world, you could almost not have success unless you’re arrested.’’

It’s a funny observation for Valli, who in the 21st century has lived a peculiar double life. While on one stage his tale - including brushes with the mafia - was being reenacted by actors every night, on the small screen he was acting out a recurring role as a disgruntled mob vet on “The Sopranos.’’ Valli loves that his character, Rusty Milio, who appeared in seven episodes from 2004 to 2006, went out with a bang. “There was a lot of mail and people calling [to HBO] and saying, ‘How dare you!’ But I would like to do things that have shock value. Everybody knows I sing. I want to do things that turn people’s heads.’’

Sarah Rodman can be reached at srodman@globe.com.