The Chartiers Valley Colts hope to win the WPIAL Class AAA championship.
They began their quest Monday by eliminating the defending champions.
Josh LaPiana was terrific on the mound and at the plate to help No. 2 Chartiers Valley roll past No. 15 South Park, 11-1, in five innings in a first-round game at West Mifflin.
LaPiana, a senior left-hander and Akron recruit, picked up the win after allowing two hits and one walk to go with six strikeouts. He improved to 7-1 for the season.
LaPiana added three RBIs for the Colts (16-3), who have won six games in a row.
Jake Ritson fueled a three-run first inning with a two-run single and finished with three RBIs.
South Park (9-10), which went 25-1 last season, lost five of its final six games.
Other Class AAA
■ Elizabeth Forward 4, Montour 3: The No. 12 Warriors (12-7) won their fifth in a row after rallying to defeat the No. 5 Spartans (12-7) at West Mifflin. Trailing 2-0, the Warriors scored once in the fourth and twice in the fifth to take the lead for good. Ryan Wardropper's RBI triple tied the score, 2-2, and Steve Welsh's sacrifice fly put the Warriors ahead.
■ Hampton 4, Keystone Oaks 1: Winning pitcher Ben Vey struck out six and scattered six hits over six innings to vault the No. 3 Talbots (12-7) to the win against the No. 14 Golden Eagles (9-8) at North Allegheny. Hampton's Tyler Merigliano had an RBI double and Tyler Iversen had a sacrifice fly in a three-run second. Keystone Oaks pitcher Taylor Lehman, a 6-foot-7 left-hander and Penn State recruit, allowed four hits and had 12 strikeouts.
■ Carmichaels 10, Springdale 2: Boosted by seven Springdale errors, the No. 10 Mighty Mikes (12-2) coasted to the win against the No. 7 Dynamos (9-8) at Mount Pleasant. Freshman Joel Spishock had two hits and two RBIs for the Mighty Mikes, who finished with six hits.
■ Vincentian 5, Union 5 (suspended): Severe weather forced the game between the No. 3 Royals (16-2) and No. 14 Scotties (7-7) to be suspended until today. The game at Burkett Complex in Robinson will resume with the Royals batting with two outs in the bottom of the sixth.
■ Sewickley Academy 2, Bishop Canevin 1 (suspended): When play resumes today at Shaler, No. 4 Bishop Canevin (10-3) will be batting in the bottom of the third against No. 13 Sewickley Academy (7-5).