Zim was expected to grow into his power. Espinosa is on a great hot streak to start off but his offense projects above Marrero and he's a MI. A legit 1B prospect should absolutely decimate AA. Eric Hosmer for the Royals is a 1B prospect. He turns 21 in late October. He popped more AA HRs than Marrero in 300+ fewer ABs and drew more BB than K. Marrero will likely max out as a decent AAAA player unless he has a sudden jump next year.
Hosmer was a 3rd overall pick, last year he had a so so year (and so did Moustakas). Both explode this year, it's normal because they have lots of talent that warranted high draft positions. It took a year or two for them to adjust, for some other guys, it takes more time (i.e Desmond). Bernadina and Desmond have been in this organization for so long that I can remember them back from the expos days. Both are now playing for the Nats. Everts was a total bust but at some point, he was back right on track despite being in the organization for a decade, he was only still 24 since he was picked out of HS but this year, he has struggled badly. With high schoolers, you gotta show patience, these young kids haven't played with wood bat for 4 years at college. Look at the raw power of Burgess, you won't find much kids with his power but he has several weakneses that will take him time to improve on. Technically, if Marrero went college route, he would be a senior that would have been picked this year. He is already at AA that might play AAA next year, if he has a good season next year he might play some games in September next year ( he will be only 23 ).
