There’s often a thin line between winning and losing in the postseason.
For Kiski Area Wednesday, that line was the free-throw line.
After falling behind by two points after three quarters, No. 13-seeded Kiski Area made 16 free throws in the fourth to upset No. 4 Plum, 50-40, in a Class AAAA first-round playoff game at Penn Hills.
Mike Simmons scored a game-high 17 points for Kiski Area (16-5), which won its first playoff game since 2010.
Plum pulled within two with 25 seconds left, but Kiski Area scored the final eight points on free throws. Plum was called for two technical fouls.
Nick Stotler led Plum with 16 points.
Other Class AAAA
■ North Allegheny 66, Norwin 36: Mike Fischer scored 14 points and Luke Gwaltney added 12, leading the No. 3 Tigers (20-3) to a victory against the Knights (13-10) at Fox Chapel. The Tigers outscored the Knights by 20 in the second half.
■ Hempfield 74, Mt. Lebanon 56: Logan Hunter scored 19 points and the Spartans (21-2) took a 22-point halftime lead en route to winning their first playoff game since 2003. Jonny David made six 3-pointers among his 31 points for the Blue Devils (11-12) at Canon-McMillan.
■ Seton-LaSalle 61, Jeannette 49: Dale Clancy’s 24 points helped the No. 1 Rebels (22-1) survive a first-round scare against the Jayhawks (13-10) at Keystone Oaks. The Rebels pulled away late after leading by just one point early in the fourth quarter.
■ Greensburg Central Catholic 73, Laurel 56: Brian Graytok scored a game-high 20 points and the No. 2 Centurions (20-2) used an 18-9 edge in the third quarter to beat the Spartans (13-11) at Peters Township. The Centurions move on to the quarterfinals for the fifth year in a row.
■ Summit Academy 75, Washington 65: Dasonte White scored 29 points and Devin Montgomery had 24 to vault the Knights (16-5) to a win against the Little Prexies (17-7) at West Allegheny.
■ Avonworth 80, Frazier 43: The Antelopes (17-5) claimed their first playoff win since 2001, routing the Commodores (15-8) at Chartiers-Houston. Eric Gallupe led the Antelopes with 15 points and Garrett Day chipped in 14.
■ Quaker Valley 64, Apollo-Ridge 47: Winter Fondi’s triple double (16 points, 10 rebounds and 10 assists) pushed the Quakers (21-2) past the Vikings (19-4) at North Allegheny. Tre Tipton paced the Vikings with 22 points.
■ Aliquippa 59, Chartiers-Houston 41: The No. 3 Quips (17-5) advanced to their first quarterfinal since 2009, eliminating the Bucs (17-7) at Moon. Jassir Jordan scored 16 points and Patrick Anderson added 14 for the Quips.
■ Beaver Falls 70, Brownsville 33: Two-time defending champion Beaver Falls (17-6) coasted to a win against the Falcons (14-8) at Chartiers Valley. The No. 4 Tigers have won nine consecutive WPIAL playoff games.
■ Neshannock 64, Shady Side Academy 63: The Lancers (18-5) advanced to the quarterfinals, edging the Indians (14-9) at Butler. The Indians had won eight games in a row.