I'll pick one for each of my teams.
O's: Armando Benitez, 1997
Ravens: Lee Evans, 2011-12
Terps BBall: Korie Lucious, 2010
Terps Football: That's a tough one. Off the top of my head, I'll go with 2012, Brad Craddock making that 33-yd FG against NC State as time expired, instead of hitting it off the upright. But that game didn't have anywhere near the magnitude of the other three.