6 seasons, 4 bowls, 5/6 at .500 or better (regular season)

Not that .500 is generally impressive, but in the 8 years before he arrived and in the two years afterwards, Virginia has done that exactly once

So, Virginia without Bronco finishes .500 or above (and makes a bowl) 10% of the time

Virginia with Bronco finishes .500 or above 83.3% of the time, making a bowl 66.7% of the time

And the one season Bronco did finish the regular season with a losing record was his first