I'm really not informed on how to project prospects, but since Peterson is my AaP, I thought I'd give my two cents. A couple weeks back, I wondered how he compares to other recent relief prospects, and in researching the stats, there are a lot of similarities to Tonkin. They're different builds in that Tonkin has a few inches of height on him, but their peripheral stats have some similarities at similar levels/ages. Tonkin joined the Twins organization out of HS, and Peterson out of college, but they both split time at A/A+ during their age 22 season. Both players seem to have (IMO) high BABIP in their age 22 season (.321 for Tonkin, .333 for Peterson), but Peterson has benefited from putting up a goose egg in the HR column. I also haven't seen any of his games, so I don't know if there's anything else to his arsenal besides a low to mid-90s FB and a nice slider.