Missing Member: Drummer Chris Mars, 2013 to 2015.
Background: The only two consistent members throughout the entire history of the Replacements was frontman Paul Westerberg and bassist Tommy Stinson, though drummer Chris Mars was on everything up until the final tour in 1991. (He was replaced by Steve Foley, who died in 2008. Founding guitarist Bob Stinson, who left in 1986, died in 1995.) The group stunned fans by reforming for a tour in 2013, though Stinson and Westerberg were the only legit members returning. Chris Mars has been inactive from the music scene for many years and is now a painter. He declined to participate. Josh Freese took his place and Dave Minehan played guitar.
Impact on Reunion: None. Replacements fans were so stoked to finally see Westerberg and Stinson back onstage that they didn't care who else played with them. Everyone loves Chris Mars, but his absence didn't mean all that much to anyone but the most intense Replacements fans that weren't going to miss out on this tour.
Odds of a True Reunion: If they get into the Rock and Roll Hall of Fame, they might all play together again. Short of that, any sort of a Replacements tour (even without Mars) seems like an outside bet. Every night on the last leg of reunion tour, Westberg wore a T-shirt with different letters on it. Nobody knew what it meant, but in the end they spelled out a sad message: "I have always loved you. Now I must whore my past." "He must have not been happy for a good long time during that second year, to have to muster that up," Stinson told Rolling Stone in 2017. "I had a ball playing those songs, revisiting them and all. I just don't get it. It was like, 'Wow, dude. So you've been thinking it's been a drag for this long, huh? Why the fuck are we doing it then?'"