Blades,
Your post made me think of what guys in UConn history were riding the bench and were suddenly inserted in games and became big time difference makers from that point on, and not just one game, like Whaley this season.
There were 2 guys I immediately thought of who, like Whaley, were suddenly inserted into action and became difference makers. Unlike Whaley, they were both freshmen.
The first one was Rashad Anderson, who was in Calhoun's doghouse to start the season because of a preseason incident in which he was arrested because of a Halloween prank that went awry. Calhoun only played Rashad because UConn was down 25 to UMass- in the 2nd half of a game at Hartford Civic Center, 2002-2003 season. Down 25, Calhoun was just shaking things up, benching the starters and looking for energy. Anderson then proceeded to come off the bench and make a bunch of 3s, and UConn came back from 25 down in the second half and won by 12. It appeared that Anderson was the guy who sparked the team and after that his *** never saw a "long term bench kiss" again.
The other guy was a freshman in the early 1990s, thickly built 6'6"-6'7" power forward from Florida, whose name escapes me. He was glued to the bench for almost his whole freshman year. Then some bigs got in foul trouble in the Big East tournament and this kid came off the bench and was a force, particularly inside on offense. He was powerful and could create space to get off his shots. It was then looking like he might be one of the better players on the team and the starting power forward the next year, and he suddenly left the team very mysteriously and went back to Florida. I don't think he ever played basketball again. Which was a shame, because he was a good player.
Edit: just remembered his name- Toraino Walker. And he was apparently a sophomore when that unbenching happened and left UConn during his senior year.
The only other guy I can think of was Hilton Armstrong who actually suddenly morphed into a meaningful player his senior year.