The first round of the postseason is in the books for Class 3A, 4A and 5A in volleyball.

On the Mahaska Zone Network, the Oskaloosa Indians dominated the Knoxville Panthers to advance to the Class 4A Region 4 semifinals against Fairfield. Osky will enter that contest 18-19 on the season. Fairfield ended the season strong, finishing 32-3, including a regular season win over the Indians. The Trojans are also ranked #11 in the final poll from the Iowa Girls High School Athletic Union.

That match begins at 7 PM in Fairfield, and you can hear that live on 104.9 FM KBOE, 99.5 FM and AM 740 KMZN, and on kboeradio.com this coming Thursday.

Also in that bracket, Grinnell held off Newton to get into the semifinals. Grinnell will have to face #10 Pella on the road on Thursday night.

In Class 4A Region 8, Washington fell in straight sets to Clear Creek-Amana. CCA will play #3 Marion in the semifinals.

In Class 3A Region 3, PCM got a big 3-1 win over Saydel on the road. PCM will be facing Chariton on the road in the semifinals, and we will have reports from that match during the Osky match on Thursday night. On the other side of that bracket, #4 Nevada is playing North Polk in the semis.

In Region 8 in Class 3A, Mid-Prairie fell to Mediapolis, 3-2, on the road. Mepo will face West Liberty, who is ranked #1 in the state in the final Class 3A rankings. In the bottom half of that bracket, Centerville swept Albia easily at home, and will host Davis County, who took out Central Lee last night. Those matches are at 7 PM on Thursday.

Finally, in Class 5A Region 3, Ottumwa fell in straight sets to Indianola to end their season. Indianola will face Southeast Polk in Pleasant Hill Thursday. SE Polk is #6 in the latest rankings, and #5 Johnston is in the other semifinal, facing Des Moines Roosevelt on Thursday in Region 3.

You can view full brackets at www.ighsau.org.