They're 4 games out of the last playoff spot. Of the 5 teams they need to catch, the Guardians are losing pitching piece by piece, and another 2 (Texas, Seattle) are in their division, and they play 4 against each. It's feasible.
Zeihl isn't a "mediocre" return. And talking about jollies, you remind us every other day that a guy retired from baseball this year. You always forget to mention that another trade from that same period netted us our 13th best prospect in Bergolla. Every single trade isn't going to net a hall-of-famer. The point is to amass a quantity of prospects, and then a couple of them will succeed.