Petros was 7 of 9 from the floor and 7 of 8 from the line, grabbed seven rebounds and had six assists. Dante Williams and Kahlil Felder both added 19 for Oakland (11-12, 6-2 Horizon) and Nick Daniels added 15 off the bench.
The teams came out on fire with Oakland hitting its first six shots and Youngstown State making 5 of 8. Things cooled a bit, and Oakland led 49-42 at the break as the Grizzlies had three in double figures before intermission.
Oakland started hot at the start of the second half as well, going on an 11-2 run - including Felder's 3-pointer - and led 60-44 with 15:46 left.