Everett held a 4-2 lead until the bottom of the eighth when the Diamond Dogs pushed across two runs to tie the game.
In the 11th, an RBI double from Jake Levin scored John Doering to give the Merchants a 5-4 lead. But an error in the bottom half of the inning allowed Valley Center to rally for the win.
Doering finished the game 3-for-6 and Levin and Josh Potter each drove in two runs to lead Everett.
With the loss, the Merchants, who also lost 2-1 to the Haysville Aviators on Saturday, were ousted from the double-elimination tournament.
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