WESTERVILLE, Ohio – It was played as a relatively tight and competitive game most of the way at Memorial Stadium on Wednesday night, but the Cardinals took over late to find space and a 15-6 victory against Marietta in the regular-season finale. Otterbein improves to 9-5 on the year and charts its best Ohio Athletic Conference record in program history in the process, ending the league slate with a 5-2 mark. Both of the losses came in the final minutes. As a result, Otterbein claims the No. 3 seed in the upcoming OAC Tournament and will host Ohio Northern in…