The Mustangs fell to the district leading Keystone Cobras 2-1 on Tuesday afternoon.
Ethan Maller scored a breakaway goal in the first half to give Lutheran a 1-0 lead. Keystone would get the equalizer later in the first half.
Keystone added the winner on a free kick just outside the penalty box.
Lutheran falls to 4-3 on the year in district while Keystone remains unbeaten at 9-0.
The two teams will play again on Friday at 5:30 at the field at Trinity Christian.