It was the heavyweight battle most predicted between the West Coast Conference’s two best teams. Saint Mary’s guard Aidan Mahaney, one of the smallest players on the court, landed most of the decisive blows down the stretch. Mahaney took over in crunch time, guiding the 18th-ranked Gaels to a 78-70 comeback victory over No. 12 Gonzaga in overtime Saturday night inside a packed University Credit Union Pavilion.