Behind Morris' boardwork, the Cougars also outrebounded SC 38-27, but their shortcomings in ball-handling and shooting (33 percent) spelled doom.
"Our kids played hard,'' said Capital coach Carl Clark, "but we didn't get much of what we wanted done. It's bad coaching. I couldn't get them to do a good job. I didn't do the things on the bench that I should have done.''
Capital hit 7 of 10 from long range in the first half, but went 0 of 7 afterward.
The Cougars lost momentum in the closing seconds of the first half when - down 39-28 and holding for a final shot - they saw SC's Rashaud Kincaid swipe the ball and pull up for a 3 to beat the buzzer. Kincaid also dished out five assists.
Cunningham said the Black Eagles didn't want to see a great season go down in flames with a first-round sectional loss and postseason elimination.
"Coach [Ronnie] Means [a former SC standout] told us they went 21-1 one year and lost their first sectional game. He didn't want that to be us. [Riverside winning] surprised me, but anybody can be beat at any time.''
Herbert was likewise surprised, but not shocked at the Riverside-GW outcome, which puts the Black Eagles and Warriors into next week's co-regionals.
"If you look at the teams that have given [GW] trouble, it's the really athletic teams,'' Herbert said. "Us, Beckley, Capital, Huntington. That's their four losses before tonight.''
SC went without two suspended players Wednesday - one starter (Neal Brown) and a top reserve (Kevin Williams). Herbert offered no comment on their status.
Reach Rick Ryan at 304-348-5175 or rickr...@wvgazette.com.