To be fair, fathom has never been a fan of his. I remember him saying how overrated his defense is at catcher in the playoffs. This isn't coming out of the blue with him.
What is interesting about Mazara besides the gap power.. his ISO has gone up the last 4 years.
'16 - .153
'17 - .170
'18 - .178
'19 - .200 (and that was only 469 PAs)
Still not great, but it's very encouraging.
It's an interesting gamble based on his age and gap power. If he can somehow improve his barrel % and his launch angle... could be a homerun. Alot of ifs... but definitely not impossible.