Oakland continued their struggle against top five ACHA teams in falling 4-3 on Friday and 5-4 on Saturday to Iowa State on the road.
Brent Cooper (two goals, assist) and Will McMahon (goal, two assists) each turned in three points Friday night and goaltender Andrew Hansen suffered his first career loss.
"The game really could have gone either way," OU assistant coach JR Dunn said. "We played tough, we played well and we are progressing rapidly."
Saturday, McMahon turned in a hat trick in the losing effort and OU netminder Jim Sardelli suffered his second loss of the season. Cooper netted the other goal. Kyle DeMaggio chipped in two assists.
"I think we proved we can skate with anyone in the country," said McMahon. "One bounce here or there and it is a different result."
Oakland will take on Davenport University in a two-game series this weekend. Friday's game is at the ONYX at 8:40 p.m. and Saturday's is in Grand Rapids.
Davenport has had a very successful season so far in ACHA DII and is a favorite to take home the DII title.
"This rivalry is a heated battle," Oakland head coach Sean Hogan said. "There is a great deal of respect between the two clubs, but both teams will settle for nothing less than a series sweep.
"I'm sure we have both been looking at the schedule and waiting for this weekend."