At Central Bucks East, No. 8 Quakertown edged No. 9 Owen J. Roberts, 35-32. Tanner Seislove's 3-1 decision at 126 pounds proved to be the difference.
No. 6 Pennridge downed No. 11 Penncrest, 40-29, at Interboro. Heavyweight Joe Kracz pinned his foe in 20 seconds to start a run of five consecutive sub-1-minute pins for the Rams.
The championships will continue Jan. 31 at Upper Dublin.
Conestoga's Andrew Diehl converted a three-point play off a putback with nine seconds remaining, and the host Pioneers held on to edge Haverford High, 42-41, in the Central League.
Also in the Central:
Rahmi Halaby and Drew Hanna combined for Penncrest's 10 overtime points, and the Lions dropped visiting Upper Darby, 52-46. Halaby finished with 17 points, and Ben Casanova paired 15 points with 13 rebounds. Upper Darby's Torey Green (16 points) hit a layup with one second remaining in regulation to force overtime.
Nick Giordano (24 points) and Tim MacNeal (16 points) combined for 14 of Marple Newtown's 20 fourth-quarter points as the host Tigers held off Strath Haven, 74-69.
Suburban One American. Chris Corr scored five points in two overtime periods to help Upper Moreland outlast host Upper Merion, 65-62.
Dan Kubler had hit a layup to force overtime for Upper Merion, which trailed by 13 points in the fourth quarter.
Public A. Sean Lloyd poured in a game-high 20 points, and Imhotep Charter knocked off host Philadelphia Electrical, 61-51. The Panthers closed the game on an 8-1 run.
Mike Watkins, a junior headed for Penn State, had 15 points, 15 rebounds, and 11 blocks to lift Math, Civics and Sciences over host Frankford, 71-61. Samir Doughty added 18 points and six assists. Tyrese Hester and Keith Griffin each added five assists.
Jahmir Taylor had 11 points, 13 rebounds, and 5 blocks, and Sammy Foreman added 11 points, 10 rebounds, and 6 assists as Martin Luther King turned away visiting Constitution, 64-40. The Cougars finished the game on a 24-1 run.
Malvern Prep completed an unbeaten regular season and clinched the Inter-Ac League championship with a 104-76 victory over Penn Charter.
Billy Beard (200 individual medley, 500 freestyle, 200 medley relay) and C.J. Schaffer (medley relay, 200 freestyle relay, 400 freestyle relay) were triple winners for the Friars, who won their second consecutive league title.