The duo beat University of the Southwest's Marek Ondruj and Felix Singer to move on to Small College National Championships in Mobile, Ala., Oct. 11-13.
The regional tournament moved to Willow Creek due to rain in Shawnee and the Bison tandem gave OBU its first men's entry in the USTA/ITA national in three seasons.
Those two will be joined by at least two Lady Bison. The singles and doubles are all-OBU finals on Monday in Shawnee.
University of the Southwest's Marek Ondruj claimed the men's singles slot by beating Macanovic in the semifinals and Carvajal in the finals.
Carvajal took a straight-set win over Singer in the semifinals.
2012 USTA/ITA Regional
Marianna Rosa, OBU, def. Ashlynn Abbe, OBU, 3-6, 6-4, 6-1
(1) Lilian Fereirra, OBU, def. Lord, 6-0, 6-2
Lilian Fereirra, OBU, vs. Marianna Rosa, OBU
Women's Doubles (Monday)
Jacob Albritton, OBU, def. Ryan Mullins, USW, 6-4, 6-2
Max Sladvosky, USW, def. Devonte Pittman, SCU, 6-0, 6-2
Alex Sandoval, USW, def. Seth Viccio, SCU, 6-0, 6-2
Marco Carvajal, OBU, def. Josh Wehenberg, 6-2, 6-0
Alfred Mohan, USW, def. Isaiah Thomas, SCU, 6-0, 6-2
Agustin Janssen, OBU, def. Matt Franks, USW, 6-2, 6-2
Felix Singer, USW, def. Albritton, 6-0, 6-3
Dario Macanovic, OBU, def. Sladvosky, 6-0, 7-6 (7-4)
Kolt Byerly, OBU, def. Sandoval, 4-6, 6-3, 7-5
Francisco Da Silva, OBU, def. Santiago Quintero, 4-6, 7-5, 6-0
Marek Ondruj, USW, def. Brandon Patterson, SCU, 6-0, 6-1
Carvajal, OBU, def. Mohan, 6-1, 6-0
Singer, USW, def. Janssen, 6-1, 6-0
Macanovic, OBU, def. Byerly, default
Ondruj, USW, def. DaSilva, 6-0, 6-0
Marco Carvajal, OBU, def. Felix Singer, USW, 7-5, 6-3
Marek Ondruj, USW, def. Dario Macanovic, 6-4, 2-6, 6-4
Ondruj, USW, def. Carvajal, OBU, 6-4, 6-4
Jacob Albritton/Francisco DaSilva, OBU, def. Brandon Patterson/Josh Wehenberg, SCU, 8-4
Marek Ondruj/Felix Singer, USW, def. Isaiah Thomas/Devonte Pittman, SCU, 8-2
Kolt Byerly/Agustin Jenssen, OBU, def. Max Sladvosky/Santiago Quintero, 8-4
Albritton/DaSilva, OBU, def. Alfred Mohan/Alex Sandoval, USW, 8-4
Ondruj/Singer def. Byerly/Janssen, 8-1
Macanovic/Carvajal def. Albritton/DaSilva, 8-5