Indeed, and he's from Dolton (a southern suburb) and lived in Hyde Park (south side of Chicago) for awhile. (Not that it's uncommon for south siders to favor the Cubs, but it certainly is amusing.)
My father-in-law grew up a few blocks from Prevost and they’re a Cubs household. The family switched a century ago, after the Sox gambling scandal. Serious business!
He also said he rarely spoke to his brother after childhood. So I doubt he is faithfully representing his essentially-long-lost brother's current opinions.
