I found an interesting post on twitter showing the top 10 MILB career slugging % since 2006. I think this was posted by a Giants fan trying to hype Brown who only has 50 PA beyond high A.
1. Kris Bryant - .649
2. Vaun Brown - .620
3. Paul Goldschmidt - .620
4. Kyle Schwarber - .619
5. Nelson Cruz - .613
6. Christian Encarnacion-Strand - .610
7. Juan Soto - .609
8. B Belt - .603
9. Howie Kendrick - .597
10. Chris Davis - .594
Not a bad list for our boy to be on. I don't know how anyone can look at that and not think he's going to mash in MLB.