The Aztecs (9-7, 1-3), the three-time regular season Mountain West Conference champion, opened league play with a home loss to New Mexico and road losses to Nevada and Boise State.
SDSU, playing just its second home game in nearly a month, used a 14-0 run in the first half to take control. Hoetzel and Matt Shrigley each hit a 3-pointer in the run, which gave the Aztecs a 32-16 lead. It was 42-23 at halftime.
Hoetzel hit four 3-pointers overall and had nine rebounds. Zylan Cheatham and Montaque Gill-Caeser each scored 10 for SDSU.
Brandon Clarke scored 25 for the Spartans (8-7, 1-3).