El Dorado went to Hays unbeaten, but the Broncos left with three loses.
The Broncos lost Friday night 8-7 in 10 innings after leading 7-5 going into the bottom of the ninth.
Hays won 7-0 on Saturday and 12-2 on Sunday to complete the sweep.
Bright spots for the Broncos were few. Thomas Clay went 4 for 11, getting two of El Dorado's three hits on Saturday. Tyler Ware homered on Sunday and drove in both of the Broncos' runs.
David Parrett homered in Friday night's game.
El Dorado pitchers didn't fare well, allowing 27 runs, 26 earned.
The Broncos have Monday and Tuesday off and will play host to Wellingtonon Wednesday. El Dorado will be off Thursday and will play host to Liberal on Friday, Saturday and Sunday.