See this week’s schedule of local sports across Butler County. It will be updated throughout the week as the playoffs progress.

Monday, May 18

Baseball

4 — WPIAL Class 6A semifinals: Seneca Valley vs. Canon-McMIllan, at Upper St. Clair HS

4 — WPIAL Class 4A quarterfinals: Knoch vs. Indiana, at Gateway HS

4 — District 9 Class 3A semifinals: St. Marys vs. Karns City, at DuBois’ Stern Field

6:30 — District 9 Class 3A semifinals: Union/A-C Valley vs. Brookville, at DuBois’ Stern Field

6:30 — District 9 Class 2A semifinals: Smethport vs. Moniteau, at Critchfield Park

7 — WPIAL Class 6A semifinals: Mt. Lebanon vs. Butler, at North Allegheny HS

Boys Lacrosse

6 — WPIAL Class 2A semifinals: Mars vs. Hampton, at Avonworth HS

Girls Lacrosse

8 — WPIAL Class 2A semifinals: South Fayette vs. Mars, at North Allegheny HS

Boys Volleyball

7:30 — WPIAL Class 3A semifinals: Butler vs. Seneca Valley, at North Catholic HS

Tuesday, May 19

Baseball

3:15 — District 10 Class 4A quarterfinals: Harbor Creek vs. Slippery Rock, at Allegheny College

6 — WPIAL Class 3A quarterfinals South Park vs. Freeport, at Plum HS

Softball

1 — District 10 Class 4A quarterfinals: General McLane vs. Slippery Rock, at Allegheny College

3 — WPIAL Class 4A quarterfinals: North Catholic vs. Knoch, at North Allegheny HS

5 — WPIAL Class 6A semifinals: Pine-Richland vs. Seneca Valley, at North Allegheny HS

Wednesday, May 20

Baseball

4 — District 9 Class 3A final: Karns City vs. Brookville, at DuBois’ Showers Field

4 — WPIAL Class 6A semifinals: Norwin vs. Butler, at North Hills HS

Softball

3 — District 9 Class 2A semifinals: Moniteau vs. Cranberry Area, at DuBois’ Heindl Field

Boys Volleyball

7:30 — WPIAL Class 3A third-place game: Baldwin vs. Seneca Valley, at Moon HS

8 — WPIAL Class 3A final: Butler vs. North Allegheny, at Peters Township HS

Thursday, May 21

Baseball

6:30 — District 9 Class 2A semifinals: Curwensville vs. Moniteau, at DuBois’ Showers Field

Boys Lacrosse

8 — WPIAL Class 2A final: South Fayette vs. Mars, at Upper St. Clair HS

Girls Lacrosse

6 — WPIAL Class 2A final: Quaker Valley vs. Mars, at Upper St. Clair HS

Softball

3 — District 10 Class 4A semifinals: Slippery Rock vs. Harbor Creek, at Penn State-Behrend

6 — WPIAL Class 4A semifinals: North Catholic vs. Blackhawk, at North Allegheny HS

Friday, May 22

Track and Field

9 a.m. — PIAA Championships, at Shippensburg University

Auto Racing

7:30 — Fab4 Racing, at Lernerville Speedway

Saturday, May 23

Track and Field

9 a.m. — PIAA Championships, at Shippensburg University