Ryder Simpson’s bases-clearing triple in the bottom of the fifth inning invoked the 10-run mercy rule as top-seeded Greely beat No. 8 Freeport 11-1 in a Class B South baseball quarterfinal Wednesday in Cumberland.

The Rangers (15-2) will host either Cape Elizabeth or Fryeburg Academy in the semifinals on Saturday.

Freeport (10-8), which eliminated Greely from the playoffs three times in the previous five years, took a 1-0 lead in the top of the first inning on an RBI double by Ben Bolduc but left two runners in scoring position, as Greely pitcher Sam Almy struck out Harry Walker.

In the bottom half of the first, Ben Kyles’ two-run double put Greely ahead for good. Almy helped himself with a sacrifice fly.

Greely added a run in the second on a Simpson RBI single, then made it 5-1 in the fourth when a run scored on an error.

Freeport loaded the bases and got Bolduc to the plate as the tying run with two outs in the fifth, but on his final pitch of the day, Almy caught him looking at a 3-2 pitch.

The Rangers then scored six times in the bottom half.

Simpson finished with two hits and four RBI, while Kyles drove in two. Almy struck out 10.