A year after delivering Division I finalists Clovis East and Clovis West in the Central Section basketball playoffs, the Tri-River Athletic Conference is imposing its will once again.

The six-team league has advanced five representatives to Thursday's quarterfinals. And its only member not present, Madera, chose not to compete in the postseason.

The TRAC received a boost in the first round from 10th-seeded Clovis, which upset No. 7 Ridgeview 64-61 in Bakersfield.

The TRAC also has No. 1 Clovis West, No. 2 Clovis East, No. 4 Central and No. 6 Buchanan in the quarterfinals. Only two play each other Thursday -- Clovis at Clovis East.

The most interesting quarterfinals matchup will send Buchanan to No. 3 Bakersfield. Neither team is big inside, and both played in good leagues -- the Drillers having knocked heads with East Bakersfield and Garces and Golden Valley in the Southeast Yosemite League.