Fink recovered from his upper body injury earlier in the season to excel out in Switzerland.
The Nittany Lions picked up one of their best wins of the season to improve to 18-1.
The freshman phenom has seven points in three games to start the tournament.
The Nittany Lions were previously ranked No. 9.
Kayden Mingo shined once again with 19 points and six steals.
The top NHL prospect will put his talents on display at World Juniors.