PITTSBURGH — Mars, Freeport and Seneca Valley will all enjoy home games as the WPIAL announced its football pairings on Monday.

All first-round contests are slated for 7:30 p.m. Friday.

In Class AAA, the Planets — the Greater Allegheny Conference champions — will host Blackhawk (3-6), who placed fifth out of the Parkway Conference.

Mars was given the No. 2 seed behind Thomas Jefferson.

Knoch (7-2), which tied for the second-best record in the Greater Allegheny Conference with Hampton and Franklin Regional, but lost to both, will travel to West Mifflin to face the Titans (8-1), runners-up in the Big Nine Conference.

In Class AA, Freeport (7-2), the Allegheny Conference champions, will host Beaver Falls (7-2), which was third in the Midwestern Conference.

Seneca Valley (8-1), which placed second in the Northern Eight Conference, is seeded fourth and will host Hempfield (4-5), which tied for fourth place in the Foothills Conference.

Butler (4-5), making its first playoff appearance since 1998, will travel to face Southeastern Conference runner-up Mt. Lebanon (7-2), which tied Upper St. Clair with the best record in the conference at 7-1.

Class AAAA

Altoona at North Allegheny; Bethel Park at McKeesport; Hempfield at Seneca Valley; Butler at Mt. Lebanon; Peters Township at Gateway; North Hills at Woodland Hills; Kiski Area at Upper St. Clair; Central Catholic at Penn Trafford

Class AAA

Hollidaysburg at Thomas Jefferson; Elizabeth Forward at Franklin Regional; Ringgold at West Allegheny; Trinity at Montour; Blackhawk at Mars; Knoch at West Mifflin; Belle Vernon at Central Valley; Hopewell at Hampton

Class AA

Steel Valley at Aliquippa; Mt. Pleasant at Burrell; South Allegheny at Jeannette; Valley at Beaver; Freedom at South Fayette; Beaver Falls at Freeport; Shady Side Academy at Washington; Greensburg Central Catholic vs. Seton-LaSalle (at Chartiers Valley)

Class A

Frazier at Clairton; Brentwood at Springdale; Neshannock at Jefferson-Morgan; Apollo-Ridge at Monessen; Carmichaels at Sto-Rox; Union at Beth-Center; Avonworth at Rochester; Canevin at North Catholic

From staff reports