I don't think you can describe anyone who's still in A ball with 133 career pro PAs at age 22 as having a floor of three wins a season. At this point it's an open question as to whether he tops three wins in any MLB season.
If you look for comparable players, say .310-.330 OBP, little power, plus-plus basestealing and CF defense, I think the archetype in recent baseball is Michael Bourn. Who did top out with some really good 5-6 win seasons, but tailed off quickly and only had 5-6 seasons as an above-average regular.
Beyond him you're looking at guys like Jarrod Dyson, Dee Strange-Gordon, Ben Revere. But only a handful of years each as average to average-plus MLB regulars. And then lots and lots of players who didn't even reach that kind of level.
I think we have a few years before we figure out where on that spectrum Bradfield falls.