As a senior in 2007–08, he averaged 19.3 points, 10.3 rebounds and 7.0 blocks per game in leading Northview to its first state tournament appearance and a 21–9 record.

Sampson started at forward and center in his sophomore and junior seasons for the Gophers and saw his minutes, points, and blocks per game increase each year.

After injuring his knee during a practice in March, Sampson was inactive for the rest of the season, including the Big Ten tournament and the postseason NIT.

He joined Kevin McHale and Mychal Thompson as one of the few Minnesota players to amass more than 1,000 points, 500 rebounds, and 200 blocks during their respective collegiate careers.

[6] On August 24, 2016, Sampson's D-League rights were acquired by the Windy City Bulls in the expansion draft.