At Sullivan, Justin Chipman led off the bottom of the eighth inning with a single and later scored on a ground ball by Aaron Leighton to give the Tigers the victory.
Joey Malloy singled twice and scored a run for 4-11 Sumner.
Jake Powell hit a two-run double for 2-13 Searsport, which rallied for three runs to tie it in the seventh. The Vikings fall to 2-13.
Searsport 000-100-30 — 4-6-1
Sumner 202-000-01 — 5-6-2
Ellis and Carrol; Malloy, Rayner (7) and Potter-Harmon