Overall, I heard different takes on the Hagler-McCallum fight that never happened. One is that then-young McCallum was calling Hagler out circa 1985-1986, but Hagler dismissed him. Others say that these stories were mostly pushed in the media by McCallum himself. And that, in reality, Hagler-McCallum fight was never really on cards.
Anyway, let's imagine both would've met each other in 1985-1986. McCallum was up and coming, but not really experienced at that point in time. While Hagler wasn't already at his best by then, but was still very much capable.
How do you expect it to go?