Monday

Baseball

New Castle vs. Butler, 4 p.m., Kelly Automotive Park

Seneca Valley at Shaler, 4 p.m.

Knoch at Hampton, 3:45 p.m.

Mars at North Hills, 6 p.m.

Freeport at Valley, 4:15 p.m.

A-C Valley at Moniteau, 4:15 p.m.

Union at West Shamokin, 4 p.m.

Slippery Rock at Mercer, 4 p.m.

Lakeview at Grove City, 4 p.m.

Softball

Butler at North Hills, 4 p.m.

Seneca Valley at Brashear, 3:30 p.m.

Hampton at Mars, 3:45 p.m.

CW North Catholic at Riverview, 3:45 p.m.

Freeport at Burrell, 4 p.m.

Grove City at Lakeview, 4:15 p.m.

Boys Lacrosse

Mars at Greensburg Central Catholic, 7 p.m.

Aquinas Academy at CW North Catholic, 4 p.m.

Girls Lacrosse

Latrobe at Butler, 6 p.m.

Peters Township at Mars, 7:15 p.m.

Greensburg Salem at Freeport, 5 p.m.

Boys Tennis

WPIAL section singles

College Baseball

California (Pa.) at Slippery Rock, 1 p.m.

Tuesday

Baseball

Karns City at Venango Catholic, 4 p.m.

Redbank Valley at A-C Valley, 4:15 p.m.

Union at Clarion, 4 p.m.

Softball

Karns City at Venango Catholic, 4 p.m.

Redbank Valley at A-C Valley, 4:15 p.m.

Mercer at Slippery Rock, 4 p.m.

Boys Volleyball

North Allegheny at Butler, 6 p.m.

Shaler at Seneca Valley, 6 p.m.

Boys Lacrosse

Knoch at Plum, 7:15 p.m.

Conneaut at Freeport, 5:30 p.m.

Girls Lacrosse

Seneca Valley at Sewickley Academy, 4:15 p.m.

Shaler at Knoch, 4 p.m.

Hampton at Mars, 7:15 p.m.

Freeport at Aquinas Academy, 5:30 p.m.

Track and Field

Shaler at Butler, 3:45 p.m.

Knoch at Mars, 3:30 p.m.

Boys Tennis

WPIAL section singles

College Baseball

Walsh at Slippery Rock, DH, 2 p.m.

College Softball

Gannon at Slippery Rock, DH, 2:30 p.m.