Voorhees led 98-95 with 1:26 left and hit just 4 of 9 free throws the rest of the way.
Brandon Allen led Voorhees with 23 points, 14 rebounds and seven steals, Dominic Stevenson had 21 points, Jeffrey Evans added 17 and Sam Dotson and James Williams had 12 each.
Justin Akieme had 21 points and 17 rebounds for Morris. Avery Johnson had 18 points, Andreaus Canty 16, Derrick Williams 14 and Clinton Chisolm 12.
In women's play:
Arielle McPhee led Allen with 12 points. Voorhees shot 51.6 for the game.
Heather Thompson played only 22 minutes and scored 18 points on 9-of-13 shooting to lead San Marcos. Cassie Damyanovich hit 7 of 8 from the floor for 14 points and Nanice Kollee was 6 of 9 for 14.
Jessica Blair had 12 points and Tykeria Howard 10 for Morris.