Class 5A 

Regional quarterfinals 

Amarillo High (33-3) vs. Lubbock Monterey (31-5-1), at Lady Bulldogs Softball Complex, Plainview 

Game 1: 6 p.m. Thursday
Game 2: 3 p.m. Friday
Game 3: 30 minutes following Game 2, if necessary

Class 4A

Regional quarterfinals 

Canyon (19-14) vs. Pampa (21-8) 

Game 1: 5 p.m. Thursday, West Plains HS
Game 2: 5 p.m. Friday, Canadian
Game 3: 30 minutes following Game 2, if necessary

Randall (27-11) vs. Dumas (29-7) 

Game 1: 5 p.m. Thursday, Dumas HS
Game 2: 3 p.m. Friday, Randall HS
Game 3: 30 minutes following Game, if necessary

Class 3A

Regional quarterfinals 

Bushland (28-7) vs. Idalou (29-7)

Game 1: 6 p.m. Thursday, Lubbock-Cooper HS
Game 2: 6 p.m. Friday, West Plains HS
Game 3: 2 p.m. Saturday, Floydada, if necessary

River Road (22-10) vs. Lamesa (18-3), (one-game), 7 p.m. Thursday, at Littlefield HS (one-game playoff)

Class 2A

Regional quarterfinals 

Sanford-Fritch (25-8) vs. Colorado City (14-6), at Lubbock-Cooper HS

Game 1: 5 p.m. Friday
Game 2: 1 p.m. Saturday
Game 3: 30 minutes following Game 2, if necessary