Mauldin and TLH played to a 3-2 Mav win @TLH early in the year. Hard to beat a team twice at their place.
Dorman's back four should be able to contain Fort Mill's front three, but I don't know about their midfield. FM is studly there. Still, I'd have to go with the Cavs in the 29th pk.
Summerville has benefited from a relatively easy draw into the 3rd round. I think they'll be much more rested than JI after their 110 minute match. Can't count out a team that beat DF, though.
RV has been another benefactor of an light playoff road on top of warming up at the end of the year. I just don't think they'll have an answer for Wando. This one might get ugly, but I'd imagine there will be some Warriors resting early in the game.