Nobody ever accused any Major League Baseball free agent of being a wholly safe bet, so it's perhaps fair to say that any player in any given market is a boom-or-bust type.
Still, we'd naturally prefer to focus on the ones in the 2022-23 market who match that description more than most.
We only considered players who haven't yet signed, as we otherwise would have been all over Edwin Díaz. We ultimately identified eight free agents who have three things in common: tremendous talent, obvious pitfalls and projections for multi-year deals worth tens or hundreds of millions of dollars.