21 year old SS in AA with a 14% BB rate, 19% K rate, and .270 ISO across 279 PA
Here is everybody since 2006 with a BB rate over 12%, K rate under 21%, and ISO of .250 or more while being 22 or younger in AA:
Trent Grisham 2019
Matt Wieters 2008
Alex Bregman 2016
Alex Gordon 2006
Colby Rasmus 2007
Gunnar Henderson 2022
Not a single non-MLB player shows up in the sample. I think Gunnar and Orelvis are the only two at 21 years old, as well. Rest were 22.
Trent Grisham is the "worst" on the list but he's not really a comparable as he just scraped out a .250 ISO that year, in 280 PA, and it was out of character. He's really not a good comparison whatsoever.
Here are some other guys who are CLOSE but just missed some of the thresholds:
Justin Upton 2007
Rafael Devers 2017
Bobby Witt Jr. 2021
Francisco Alvarez 2022
Spencer Torkelson 2021
Coby Mayo 2023
Corbin Carroll 2022
Giancarlo Stanton 2010 (.417 ISO lmao)
Curtis Mead 2022
Cristian Yelich 2013
Eric Duncan 2006
Dylan Carlson 2019
Rowdy Tellez 2016
Cody Bellinger 2016
Conclusion: Orelvis Martinez is a likely MLB player and his statistical profile indicates 4+ WAR upside, depending on defensive value.