Classes are over. The guys are just thinking about baseball now so rest should not be a problem.
Hell, these guys are in their late teens and early 20s and are used to playing 2 (or more) games a day in travel ball. None of out pitchers will be unavailable by pitching last night.
They may be more tired from sittign around for several days than playing baseball.
10 BBs and 5 HBPs just reinforces the notion that the Vols only have 4 pitchers who are consistently ready and able to pitch against D1 (especially SEC) teams.