Tuesday

Baseball

Pine-Richland at Seneca Valley, 4 p.m.

Burrell at Knoch, 5:30 p.m.

Mars at Plum, 3:45 p.m.

Freeport at North Catholic, 4:15 p.m.

Union at A-C Valley, 4 p.m.

Softball

Union at A-C Valley, 4 p.m.

Slippery Rock at Titusville, 4 p.m.

Track and Field

Butler at North Allegheny, 3:30 p.m.

Armstrong at Mars, 3:30 p.m.

Kiski Area at Freeport, 3:30 p.m.

North Catholic, Aliquippa, Rochester at South Side, 3:30 p.m.

Boys Lacrosse

Knoch at Shaler, 6:30 p.m.

Mars at Indiana, 7:30 p.m.

North Catholic at Freeport, 4 p.m.

Boys Volleyball

Shaler at Seneca Valley, 7:30 p.m.

Mars at Gateway, 7;30 p.m.

North Catholic at OLSH, 7:15 p.m.

Boys Tennis

WPIAL Singles Championships at Fox Chapel

Wednesday

Baseball

Butler at Central Catholic, 3:30 p.m.

Karns City at Brockway, 4 p.m.

Slippery Rock at Meadville, 4 p.m.

Softball

Butler at Seneca Valley, 6 p.m.

Knoch at Freeport, 4:15 p.m.

Mars at Hampton, 3:45 p.m.

Punxsutawney at Karns City, 6 p.m.

Union at Forest Area, 4 p.m.

Track and Field

Pine-Richland at Seneca Valley

Keystone at Moniteau, 4 p.m.

Union/A-C Valley at Redbank Valley, 4 p.m.

Boys Lacrosse

Norwin at Butler, 7 p.m.

Seneca Valley at Shady Side Academy, 7:45 p.m.

Freeport at Moon, 8 p.m.

Girls Lacrosse

Blackhawk at Knoch, 7 p.m.

Mars at Ambridge, 7 p.m.

Freeport at Sewickley Academy, 4:30 p.m.

South Fayette at North Catholic, 4:30 p.m.

Boys Volleyball

Butler at Hempfield, 7:30 p.m.

North Catholic at Beaver County Christian, 7:15 p.m.

Boys Tennis

WPIAL Singles Championships at Fox Chapel

Shaler at Knoch, 3:30 p.m.