OBU advanced to the finals with a 77-56 win over Mountain State, but they'll be without starting senior forward DeAngelo McIntosh, who ruptured his patella tendon in the first half.
"DeAngelo's injury really puts a damper on things," said OBU Coach Doug Tolin. "Marques Anderson will start tomorrow. I hate this for DeAngelo. He's worked so hard to get to this point and his season's been cut short."
OBU plays Concordia (Calif.) at 7 p.m., Tuesday on CBS Sports Network. The game also is available on KGFF and obubison.com.
The Bison fell behind early, but used a 15-0 run to get a 26-10 lead at the 12:06 to play. OBU got two of Heath McKay's six three-pointers in the game during that run. McKay had 26 points for the night - one off his career high.
McIntosh went down with 6:39 left in the first half, during an OBU scoring drought and the Bison had a nine-point lead. After the injury, OBU got five points from McKay and Emmanuel Wilson hit a three-pointer with one second left in the half for a 40-25 lead at intermission.
Mountain State worked the lead down to 44-31 four minutes into the second half. The Bison answered with a 13-2 run, fueled by six points from Jacobi Isham and five from McKay.
"Jacobi did a great job penetrating for us," Tolin said. "We did a good job of getting them spread out and when we moved the ball, we got good shots. We needed to make shots tonight and we did."
The lead peaked at 32 points on two occasions, the first coming on McKay free throws for a 71-39 lead at the 8:03 mark. David Johnson had two free throws for a 73-41 lead with 7:31 to go.
Despite a huge height disadvantage, the Bison out-rebounded the Cougars, 37-32.
"They had fight, but we are more physical and that's where we won," said Anderson, who led the Bison with seven rebounds. "This team is a big family."
Joining McKay in double figures in the scoring column were Isham with 15, Johnson with 12 and Wilson with 10.
Devon Patterson led MSU with 11 points and the Bison held the Cougar starting bigs to a combined 13 points on 5 of 13 shooting. Once the Bison took command, Mountain State turned to three-point attempts and shot nine percent from there.
"Hustle beats size," said Johnson. "Size doesn't faze me. We just try to do what's best for the team."
The win gives OBU a record eighth appearance in the NAIA championship game, eclipsing the seven of arch rival Oklahoma City.