Brooke Lawson returned to throw five shutout innings in the 5-0 victory.
Canton scored eight runs in the fourth to pull away for a 13-0 victory.
Hannibal was held to just four hits in a loss to Mexico.
Hannibal hit into two double plays among other base running errors in the loss.
Monroe City banged out 21 hits on the way to a 10-3 victory.
Palmyra's Megan Stone started a two-run sixth inning when she reached base on an error.
Madelyn Meyer's home run lifts Monroe City past Highland.
Maggie Woodside finished the doubleheader with seven RBIs as the Pirates combined for 30 runs in the two games.
The Palmyra softball team beat Putnam County 1-0 to earn the consolation title at the Centralia Invitational Softball Tournament.
The Hannibal softball team held off a Fulton rally for a 5-3 victory.