This is the one people will argue, but Blake Treinen was pure trash for Washington and Oakland took a chance on a guy with elite stuff and that they could address his control issues. It appears they have done that.
Rental relievers are not high value, in spite of how teams are currently using relief pitching.
To me this emphasizes one thing: The trade(s) the Cashman pulled off for Chapman were highway robbery. Yes, Chapman is essentially a unicorn on the trade market. Lefty that throw 104. You don't get that EVER. Even someone like Billy Wagner peaked around 100, and by the time he was rental/trade candidate, he was around 98. Torres (#1 Cubs prospect), McKinney (#5 prospect) and another prospect in the top 30 for a RENTAL RELIEVER. You don't get that. On top of that, he got Adam Warren back. He gave up next to nothing for him.
Look at what Brad Hand (2 1/2 years left) returned, and he was packaged with another reliever who is a rookie (5 years on control). Mejia is a top tier prospect, but that was all they got. Nothing else, and it has been viewed as a relatively fair trade.
This is somewhat of the return I expected. A hole in the organization (3b) and a guy who is close to the majors as a reliever (really good AAA numbers in the PCL).