Prime, SA, and Woodson are members of the NFL's '90s All-Decade team -- along with Bruce Smith, Reggie White, Cortez Kennedy, John Randle, Junior Seau, Derrick Thomas, and Kevin Greene -- ALL who are members of the Hall.

Butler is the only guy on the All-Decade squad who isn't in Canton ... and he tells TMZ Sports that's a helluva reason to put him in.

"I really would love to be in the Hall of Fame this particular year, 2021. And, plus, it's a little embarrassing to be the only All-Decade member, 1st team, not in the Hall of Fame."

Butler says some of the other players have bigger names ... but when it comes to the football field, he contributed as much as the other HOF'ers.

"It's like 'generic' and 'brand.' You get Woodson, brand, put him in! Manning, brand. Generic, LeRoy Butler. But, I do the same thing as them. I'm just cheaper. I think they should put me in to say we close out the '90s to the 2000s. Done, start the new decade! So, I just pray."

BTW, there's a reason LeRoy made the All-Decade team ... he had a great, 12 season career in Green Bay. He made 1st team All-Pro 4 times, 4 Pro Bowls, and won a Super Bowl with Brett Favre and the Packers in 1997.

Butler also breaks down his foray into the liquor biz ... 'cause he just launched a new vodka, aptly named Leap Spirits.

Remember, Butler was the 1st player to Lambeau Leap back in 1993.