I remember there was also some discussion about Jeff Fort in Chicago having whacked 2 Outfit associates (though not made members). Probably weren't considered important since there were no retaliations. Don't remember the names though.
But is 26 too young? Bonanno was boss at 26, Yonnie Licavoli at 23, Riccobene was made at 18. I thought cases like Ligambi made in his 40s were rarer.