Leake matched his season high with seven strikeouts in seven innings and Seattle rallied with four runs in the eighth inning to beat the Oakland Athletics 6-3.
Encarnación hit two homers to become the third active player with 400 homers, and Tom Murphy added two more homers in the Mariners' 9-3 victory over the Los Angeles Angels.
Jose Suarez allowed three runs over 5 plus innings and got plenty of support from Albert Pujols and the Los Angeles Angels offense to beat Seattle 13-3 on Sunday.
Vogelbach's mammoth two-run homer in the seventh inning was the highlight of a 6-2 win over the Texas Rangers that snapped Seattle's six-game losing streak.
The Mariners built a 4-2 lead through six innings on solo homers by Vogelbach and Beckham and a two-run, tie-breaking homer in the fifth inning by Mitch. Haniger.
Lester and two relievers combined on a one-hitter, Báez homered and doubled during Chicago's six-run second inning, and the Cubs beat the Seattle Mariners 11-0.
Seattle Mariners third baseman Kyle Seager needs surgery on his left hand and will be out at least through April. Seager will have surgery Tuesday to repair the tendon of his middle finger.
Well, everything was working great for the Mariners. The bats were on fire and the pitchers' arms were true as Seattle routed the Astros 9-0. AL West race is tight.