LMU blew a three-run lead with two out in the ninth before falling 7-5 in 10 innings.
LMU and UCSB had a game suspended due to darkness on Tuesday with the game tied 6-6.
Portland hit two homers, including a go-ahead inside-the-park home run in the seventh, to beat the Lions.
Sophomore J.D. Busfield converted his 13th save of the year, matching the LMU record set by Darryl Scott in 1988.
LMU held off Pacific on Sunday to earn a 3-2 victory and the series over the Tigers.
Sixth-year head coach Jason Gill previews the 2014 LMU baseball season.
BASE | LMU 5, #26 Oklahoma State 2
2013 Baseball Season Preview with head coach Jason Gill.
Interviews with the player-managers prior to the start of the 2012 Crimson/Navy World Series
The LMU baseball team held its annual Halloween costume practice on Wednesday.
Final game of three-game WCC series at Page Stadium
Conference match-up from Page Stadium
Non-conference match-up from Page Stadium
Series finale from Page Stadium.
WCC opener at Page Stadium on Mar. 13, 2015
2013... started 49 of LMU's 51 games as a sophomore... finished the season hitting .246 with seven doubles, 16 runs scored and 22 RBI... 22 RBI were good for third on team... stole five bases on the year... .359 on-base percentage ranked fourth on the team... contributed a two-RBI double against Utah on 2/15... career-high tying three-hit games at #14 Oregon on 2/22, at UNLV (3/1) and vs. Bradley (3/3)... went 3-for-5 with two RBI at UNLV on 3/1... 3-for-6 with two runs scored, a double and two RBI vs. Bradley (3/3)... hit .421 (8-for-19) with four runs scored and five RBI at UNLV Rebel Classic (2/28-3/3)... hit .400 (12-for-30) with five runs scored, seven RBI and three doubles over a six-game hitting streak from 2/24-3/5... 2-for-2 with a run scored, a double and two walks vs. #23 San Diego on 4/5... 2-for-4 with career-best three RBI at San Francisco on 4/19... batted .313 with runners on base and .320 with runners in scoring position...
2012... batted .246 with nine runs scored, two doubles and a homer as a freshman... made 15 starts and appeared in 25 games... posted a .273 batting average in West Coast Conference play... reached base in six of his 14 opportunities (.429) when leading off an inning... was 3-for-9 as a pinch hitter... first career hit came in first collegiate at bat as pinch hitter on February 19... belted first career home run at BYU on April 7, part of a 2-for-3 day with two runs scored... recorded two hits against Pepperdine on May 20... posted his first career three-hit game at Santa Clara on May 27 (3-for-4)...