TURLOCK — The Warriors opened defense of their West Region crown and tournament title Friday but signs of rust showed as No. 10 Cal State Stanislaus dropped a pair of games on opening day.

Seattle University and Cal State San Bernardin handed Stanislaus a pair of upset losses, 4-0 and 11-8 in nine innings, respectively, to start the Mizuno Best of the West Invitational at Pedretti Park in Turlock.

The Seattle Redhawks scored three times in the fifth to put the game away in a 4-0 win over the Warriors. Kelsey Reynolds tossed the complete game for Seattle. The Redhawks lost to CSUS 1-0 in last year's West Region championship game at Warrior Field.

Sandra Hernandez went 3-for-3 to lead SU offensively. Casey Stephenson was 2-for-3 to lead Stanislaus but key hits eluded the Warriors in their opener against the No. 18 Seattle University Redhawks.

"We should have hit better in the first game. I was pleased with our offense late in the second game," CSUS head coach Jan Schefkowitz said. "It's early and we are a little rusty not having been able to practice outside much in the last two weeks."

In the game against Cal State San Bernardino, the Coyotes got six early runs and led 7-1 after four innings. The Warriors also committed two errors in a two-run third inning. CSUSB chased starter Jennifer Arnold after two innings, but Warrior reliever Stacey Hains kept her team in the game.

Cal State Stanislaus staged a tremendous comeback in late innings, scoring three in the sixth and four in the seventh to take a brief 8-7 lead. Sarah Shamblin's double scored Breah Emery and Hains for the go-ahead run to complete the comeback.

The Coyotes, however, rallied to tie in the bottom of the seventh on a Ashley Collinwood pinch hit double that scored Tori Beaudette, who singled to start the inning. Beaudette finished with two hits and drove in three runs.

Arnold had three hits in the nightcap against CSUSB, including two doubles and drove in a run.

The Warriors will face Notre Dame de Namur at 12:15 p.m. when the tournament continues on Saturday. Stanislaus will also square off against CCAA rival UC San Diego at 2:30 p.m. UC San Diego went 2-0 on Friday.

No. 6 Humboldt State 7, CSU San Bernardino 5
Natalie Galletly, CCAA's Most Valuable Player in 2007, went 2-for-4 and drove in two runs as the Lumberjacks won their opener over the Coyotes. HSU scored twice in the sixth to break a 5-5 tie.

No. 18 Seattle 5, Cal State Dominguez Hills 4
The Toros' seventh inning rally came up short as No. 18 Seattle held on to beat CSUDH. Erin Martin went the distance and struck out four while Jane Purdy went 2-for-4 with two RBIs for the Redhawks.

UC San Diego 6, Davis and Elkins 2
Danielle Lukk went 2-for-3 and Jenny Maze had an inside the park home run to lead the Tritons over the Senators. Davis and Elkins of Elkins, W. Va., got two hits from Anna Stem.

Notre Dame de Namur 3, Grand Canyon 2
GCU left 13 runners on base and Cierra Kenney led NDNU had two hit of the team's four hits with a double and a triple.

Cal State Monterey Bay 3, Chico State 1
The Otters scored twice in the sixth and Easton Henrikson and Alexis Villarin each had two hits in the win. Angela Cabral got the win for CSUMB with five K's in the complete game.

UC San Diego 5, No. 6 Humboldt State 2
In a match-up of two of the top pitchers in the region, Melissa Ward won the battle this time over Lizzy Prescott in UCSD's win. Ward fanned six and allowed two runs -- one unearned -- and Maze hit another inside-the-park  home run to lead UCSD. Caitlin Klug was 3-for-4 for HSU.

Cal State Dominguez Hills 1, San Francisco State 0
Pinch hitter Kristin Tanaka drove in the game's only run in the sixth as the Toros got the win despite collecting just two hits. Regina Farfan had six strikeouts for CSUDH. San Francisco State starter Vanessa Truan gave up just two hits and fanned five in the loss.

Notre Dame de Namur 7, Davis and Elkins 5 (9 inn.)
Danielle Holt went 3-for-5 and Tara Van Meter had two hits including a home run in leading the Argonauts. Britne Bacca pitched all nine innings and struck out 10 in defeat. The score after seven innings was 3-3.

Cal State Monterey Bay 9, San Francisco State 0
The Otters went 2-0 on day one after blanking the Gators. Ashlee Trotter went 2-for-3 with a home run and drove in three runs and Casey Kaufman also had two hits to lead the CSUMB offense.

Chico State 5, Grand Canyon 4
After GCU scored three runs in the seventh to take a lead, Chico State rallied for two runs for the win. Chico's Kathy Domanycic drove in the game-winner. Nickie Jarrett and Rebecca Johnson each had three hits for the Wildcats.