Joc Pederson connected for his sixth homer as Los Angeles took two of three from Toronto. It’s the first series win for the Dodgers since they won two of three at Colorado from April 22 to 24.
Chris Hatcher (3-3) got the win despite yielding a run in the seventh that gave Toronto the lead. Pedro Baez got two outs in the eighth and Kenley Jansen finished for his major league-leading 11th save.
Seager made it 4-2 with an RBI single off Chad Girodo in the ninth.
Toronto has lost two straight after winning the previous four.
Dodgers right-hander Ross Stripling pitched six innings of one-run ball. The rookie struck out six and walked none after yielding a season-high five runs in his previous outing, April 30 against San Diego.
Pederson tied it with a two-out drive off Marco Estrada in the seventh.
Estrada, who held the Dodgers hitless through the first five innings, remained winless in five outings. He allowed one run and three hits in seven innings.
Estrada has received six runs of support during his five-game winless stretch.
Dodgers: RHP Mike Bolsinger (strained left oblique) allowed two runs and three hits in four innings in his first rehab start with Triple-A Oklahoma City on Saturday.
Dodgers: LHP Scott Kazmir (2-2, 5.68 ERA) starts as Los Angeles returns home for the opener of a four-game series against the Mets on Monday night. LHP Steven Matz (1-4, 2.83 ERA) starts for the Mets. Kazmir is 2-1 with a 4.80 ERA in three career starts against the Mets.
Blue Jays: RHP Aaron Sanchez (2-1, 2.82 ERA) starts the opener of a three-game interleague series at San Francisco on Monday night. His opponent will be RHP Jake Peavy (1-3, 9.00 ERA). Sanchez has never faced the Giants.