Sam Swiatek hit a pinch-hit grand slam as part of an 11-run sixth inning for the Mars baseball team in a 17-2 win over East Allegheny Thursday afternoon.

The game was played at Mars' home field, but East Allegheny was the home team.

The win clinched the Section 4-AAA championship for the Planets (15-4, 12-2).

Swiatek's grand slam was the first for Mars since C.J. Weigand connected for one May 9 of last year against Highlands.

The 11-run sixth was the most scored in an inning since 2002 when the Planets put up 11 runs in the third inning against Freeport. The team record is 15 runs in an inning set in 1995 against Springdale.

Elsewhere:

• Ethan Williams had a pair of hits and an RBI and also picked up the win on the mound as Karns City routed Redbank Valley 14-0 in five innings.

Ben Sinz, Tyler Kepple and Wyatt Everetts each drove in two runs for the Gremlins (11-2).

Mars 210 03(11) x — 17 13 0East Allegheny 100 010 x — 2 2 4W: Nathan Furl 6IP (8K, 5BB).

L: Casey Holshue 2.1IP (0K, 5BB).

Mars (15-4, 12-2): Alex Smith 2B 1B RBI, Nick Comport 1B 3-RBI, Matt Eperesi 2-2B 1B, Sam Swiatek HR 4-RBI, Connor McGinnis 2-1B RBI, Nick Vranich 1B 2-RBI, David Bednar 1B RBI

East Allegheny (4-15, 2-12): Adam Jacko 2B 1B RBI

TBD: Mars at WPIAL Playoffs

Redbank Valley 000 00x x — 0 1 3Karns City 143 6xx x — 14 11 0W: Ethan Williams 3IP (3K, 5BB).

L: Doug Gundlach 4.1IP (0K, 4BB).

Redbank Valley: Josh Shaffer 1B

Karns City (11-2): Tyler Kepple 1B 2-RBI, Williams 2-1B RBI, Derek Sadowski 2B, Scott Kiser 2-1B, Ben Sinz 1B 2-RBI, Brandyn Bowser 2B RBI, Wyatt Everetts 1B 2-RBI

Monday: Union vs. Karns City at Pullman Park, 6:45

Morgan Deal had a double and a single, but Karns City was edged by Redbank Valley 3-2.<B>Redbank Valley 101 001 0 — 3 8 0Karns City 000 200 0 — 2 4 2W:</B> Jones 7IP (3K, 0BB). <B>L:</B> Lauren Downs 7IP (2K, 2BB).<B>Redbank Valley:</B> Rearick 3B 2-1B, Kunselman 2B<B>Karns City (5-8):</B> Morgan Deal 2B 1B, Lauren Mildren 1B, Downs 1B<B>Tuesday:</B> Karns City at Clarion

Mike Hardross scored five goals as Seneca Valley downed Butler 15-5.Derek Finney added three goals and Brendan Thomas chipped in two for the Raiders (14-1).Cody Bachman scored two goals to pace Butler (10-6).

Olivia Kappler and Bailey Kraus each scored three goals as Butler pulled out a 10-9 win over Vincentian to force a play-in game against Blackhawk next week.The Golden Tornado (10-8) will play Blackhawk Wednesday at a site and time to be determined. The winner will advance to the WPIAL playoffs.<B>Seneca Valley 17, Franklin Regional 9 </B>— Natalie Roche and Audrey Nicola each scored three goals to lead the Raiders (11-4).Seneca Valley will open the WPIAL playoffs May 18 against an opponent at a site and time to be determined.

Seneca Valley continued to roll with a 25-14, 25-27, 25-20, 25-15 win over Butler.Chad Albert had 18 kills and Brian Pudlo added 13 kills for the Raiders, who won the Section 2-AAA title.Max McCloskey had 45 assists for Seneca Valley.Xavier Krause paced Butler with 18 kills.