Sale cost the #1 prospect in baseball plus 3 more. Effectively two mayers. Lopez isn’t exactly Sale, but Mayer isn’t exactly Moncada/Kopech either.
I’d also expect to get more than Lopez back in a trade, with more moving parts, maybe even a third team to bring in a closer type or someone with closing potential too.
Also, with Mayer, you. An shoot a little higher than Lopez maybe.