The Hawaii baseball team’s 3-1 loss to Oregon was not the most disheartening setback on Friday night.

UH coach Mike Trapasso announced the Rainbow Warriors’ best slugger — center fielder Adam Fogel — is likely to miss the rest of the season because of an injury to his right shoulder.

Trapasso said an MRI on Friday “showed significant damage to the shoulder. We’re looking at the options, but we have to prepare for him being out for the year. Surgery is the most viable option. … It’s bad news for Adam. I feel terrible for him. We have to pick ourselves up and have him taken care of and, at the same time, move forward.”

The ’Bows did not have better results against Oregon right-hander Cullen Kafka and his biting two-seam sinker. Kafka entered with a 4.41 earned-run average in three starts in which he allowed 15 hits and 10 walks in 161⁄3 innings. But on a blustery night, Kafka metamorphosed into a dominant pitcher.

“The job Kafka did was the story of the game,” Trapasso said. “We didn’t have an answer for Kafka.”

Kafka allowed six hits and struck out five in seven innings as batters battled 18 mph winds. Of the 21 outs when he was on the mound, 14 were initiated by groundouts. Kafka credited a sinker that he mastered in experimental stages, from learning the grip to trying out different pressure points to a pitch that “just dies. It’s pretty heavy.”

Kafka said he threw the sinker between 60 and 70 percent of the time, mixing in a fastball and changeup.”

Kafka out-dueled UH ace Dylan Thomas, who battled for six innings, exiting with a 2-1 deficit.

Thomas had temperamental command of his three-pitch repertoire — slider, fastball and change-up — but still managed to escape jams after yielding two first-inning runs. On Friday, Thomas gave up four hits and four walks — matching last season’s walk total for the entire 2018 season. But Thomas did not allow a run after the Ducks placed runners at second and third in the third and fifth innings. In the sixth, Thomas induced designated hitter A.J. Miller to ground out on the 11th pitch of the at bat.

“He had no command at all,” Trapasso said of Thomas. “That was as poor as I’ve seen Dylan pitch. But he gave up two runs in six innings, and if that’s the worst that you’re going to get out of Dylan, I’ll take it.”

The first pitch was out of the twilight zone. Sam Novitske hit a towering fly that UH center fielder Daylen Calicdan lost in the gray clouds. Novitske wound up at third base.

“I heard the ball hit the bat, looked up, and just saw the sky,” Calicdan said. “Where I thought the ball was going to be and where it ended up being wasn’t the same spot. I lost it in the sky. It was that gray. We work on that in practice, but it’s not the same as in a game.”

Trapasso said: “That first pitch proved to be ominous. A can of corn we lost in the twilight, and it turns into a triple. It should have been one pitch, one out.”

Jonny DeLuca then drew a five-pitch walk from Thomas to place runners at the corners.

After Spencer Steer struck out — the first time he did not reach base in the series — DeLuca took off toward second on a 1-1 pitch. But the play was a bait-and-steal ruse. As catcher Tyler Murray threw to second, Novitske broke for home, easily scoring for the game’s first run.

Gabe Matthews then singled past second baseman Jack Kennelly to make it 2-0.

The ’Bows closed to 2-1 in the bottom of the fourth. With two outs, Alex Baeza pulled a drive over right fielder Aaron Zavala for a double. Ethan Lopez followed with a single to center and Baeza raced home for the ’Bows’ first run.

But the Ducks added a run against reliever Logan Pouelsen to extend their lead to 3-1 in the top of the seventh.