Lake Oswego suffered just its third loss of the season on Tuesday and its first to a team other than No. 1 Jesuit.
The Lakers wrapped up the preseason with a 53-48 loss against Lincoln, yet another top-10 opponent.
Lake Oswego had one stellar quarter in the game, outscoring the Cardinals 21-7 in the third period and that was almost enough to eke out a win.
The Lakers got off to an exceptionally slow start offensively, scoring just 17 points in the first half.
Virtually the entire game would be a defensive struggle as Lincoln put its top defender on Calvin Hermanson and held him in check for most of the contest.
"He's a very good defender but there were times where we weren't even looking for Calvin. We've still got to get him the ball and see if he can create something," coach Mark Shoff said.
Lake Oswego trailed 24-17 at the half but then turned things around to start the third quarter.
The Lakers began to attack the basket more and started to break down Lincoln's tough defense.
Lake Oswego scored more points in the third quarter than it did in the entire first half and seemed to have control of the game as it turned a seven-point deficit into a seven-point lead with one quarter to play.
But the burst would be short-lived. The Lakers were stymied again in the fourth quarter and were ultimately done in by a string of turnovers, many of which were unforced.
"This year if you don't come ready to play against one of the top teams you're going to be beat," Shoff said.
Lincoln was able to erase the deficit and walk away with a big win.
Lake Oswego has seen most of the top contenders in the state this year and has played one of the toughest non-league schedules around.
"The difference right now between a team like Jesuit and us is toughness. We've got to rebound better and be more aggressive," Shoff said.
Lake Oswego got a balanced scoring attack with Collin Caslick leading the way with 10 points. Mitch Lomax and Jason Luhnow each scored nine points and Hermanson and T.J. Dorado scored eight apiece.
The Lakers also got strong play from Cory Coombe.
Lake Oswego will open up league play at Oregon City this Friday night.