ARCATA -- An error-filled game was no way for the Cal State Stanislaus season to end Friday.
But the sleeping giant that is Humboldt State woke up in the NCAA Division II West Region Championship Tournament, forcing the Warriors to make mistakes in a 9-2 loss in Arcata.
The No. 8 Lumberjacks, who lost both their CCAA tournament games and their opening game in the Far West tournament, scored seven runs in the top of the eighth inning to send the defending West Region champion Warriors home.
Geneva Perrine's eighth-inning grand slam -- the first home run of her collegiate career -- broke the 2-2 tie in Humboldt's seven-run explosion.
After fouling off three offerings, Perrine drove Jessica Gaumnitz' 2-2 pitch over the left-center fence. Following a walk, Nikki Ketteringham hit a two-run homer down the right-field line, and Natalie Galletly later scored on a throwing error to finish the scoring.
Uncharacteristically, the Warriors (31-23), ranked No. 18, made five errors.
"We are a good defensive team and you just can't make mistakes," Stanislaus coach Jan Schefkowitz said. "Every once in a while that happens and good teams take advantage."
The Warriors got on the board first in the bottom of the first inning with a two-out rally. After Meghan Franksen singled and Casey Stephenson walked, Jennifer Arnold doubled to right-center field to score the first run. Alyssa Guzman then singled past the third baseman to plate Stephenson for the 2-0 lead.
In the Humboldt fourth, after a leadoff walk and a single, Gaumnitz got the next two outs on a called third strike and a sacrifice bunt. Gaumnitz said she thought she had a strikeout for the final out, but the pitch was called a ball.
On the next pitch, Lindsay Warren grounded to third, but Warriors third baseman Sarah Shamblin's throw to first base sailed high as the Jacks (49-18) scored two runs. Shamblin, arguably the best defensive third baseman in the West with a .946 fielding percentage, had just eight errors all season.
"This is a game of inches and today the it didn't go our way," she said.
Gaumnitz took the loss, lasting 7º innings, striking out six, walking two and giving up all of the runs, five of them earned.
Humboldt went on to beat San Bernardino 5-1. The Lumberjacks play Dominguez Hills today at 11 a.m. in an elimination game. The winner advances to the championship against Western Oregon.