Happy Valley came up short in a wild nonconference matchup in Mountain City.
The Warriors dropped a 48-39 decision to the Longhorns after rallying from a nine-point halftime deficit.
Joseph Sowards gave HV the lead in the early going when a short touchdown run before the Longhorns answered to take the lead.
After HV rallied to take the lead, Johnson County scored with 1:42 left to regain the lead for good.
Sowards and Reagan Ensor had three rushing touchdowns apiece in the win.
