YOUNGSTOWN — John Mayer is a man of many guitars and many genres.

There’s the sensitive singer-songwriter, the guy who’s had more than 20 adult contemporary hits. There’s the blues guitar wizard who attracts fellow musicians more likely to be wearing T-shirts repping their favorite gear than their favorite band. And there are the Deadheads, who (mostly) have embraced Mayer as part of Dead and Company for the past decade.

Which one headlined YLIVE on Friday at Wean Park? Mostly the first one, but all three were represented.

Friday’s concert was Mayer’s first public show with his full band in about three years — an eight-member ensemble with two additional guitar players, two percussionists, two backing vocalists, a bassist and a keyboard player.

There were few, if any, signs of rust. The band sounded tight, and while Mayer always was the primary focus, different numbers spotlighted individual musicians. And for a concert venue that only is used once — well, now twice — a year, the sound was pristine. Those in the reserved seats weren’t deafened by the array of speakers, and the clarity still was good out on the lawn.

The setlist leaned toward mellower songs like “I Guess I Just Feel Like” and “Love on the Weekend,” a song perfectly suited for the late-summer vibes of the Mahoning Valley’s unseasonably warm early-fall weather. But even in the quiet songs, Mayer found a slot for a guitar solo.

After opening with “Last Train Home,” Mayer followed with “Queen of California,” where his Grateful Dead influence rang loudest. However, the most Dead thing about Friday’s show was that Mayer felt no obligation to play many of his most popular songs. Mayer comes from the Dead school of fluid setlists or at least not playing “greatest hits” shows, so there was no “Daughters,” no “Your Body Is a Wonderland,” no “Heartbreak Warfare,” no “No Such Thing.”

He even half-apologized to his hardcore fans before playing “Waiting on the World to Change,” acknowledging he had to give the newcomers something they knew and those looking for deep cuts could scroll their phones during it.

He might not have played all of his biggest hits, but there was no denying the quality of what Mayer and the band delivered. “Belief” and “Wild Blue” were among the many songs punctuated by impressive guitar solos, and the first encore featuring Mayer joined by guitar player David Ryan Harris for a cover of Tom Petty’s “Free Fallin'” was another highlight.

A more legitimate gripe might be the quantity of music performed. Friday’s concert was in the vicinity of 90 minutes, maybe a couple minutes under. That would be long for his show Saturday, where he was the special guest before Zach Bryan at the University of Michigan’s football stadium. It would be normal in the closing slot of a day-long music festival, which he did Sunday in the Nashville area.

But this was a John Mayer headlining concert. For the first six weeks that tickets were on sale, he was the only announced act.

The always-great Pittsburgh band The Clarks opened the night and packed as many longtime fan favorites (“Shimmy Low,” “Born Too Late,” “Penny on the Floor,” “Better Off Without You,” “Snowman”) as possible into a half-hour set. Lead singer Scott Blasey also announced a return date to Youngstown on Nov. 8 at Westside Bowl.

Also on the bill was Charles Kelley, best known as part of the country act Lady A. He showcased his new solo album “Songs for a New Moon,” a collection of yacht rock and ’80s-style ballads in the vein of Peter Cetera or Richard Marx, but he also did Lady A’s biggest hit, “Need You Now.” Mayer’s fan base certainly includes some adult contemporary listeners and Kelley has a current top 10 AC hit with “Can’t Lose You,” but he felt like an odd fit on the bill.

Even with two opening acts, a 90-minute headlining set by an artist in his prime and with a catalog as extensive as Mayer’s felt slight. Sometimes the old adage “leave ’em wanting more” can be taken too far.