George Kirby escaped an early bases loaded jam to throw six shutout innings, Seattle took advantage of three Houston errors, and the Mariners snapped a four-game losing streak with a 6-2 win over the Astros.
Santiago Espinal Pinch-hit single home the tiebreaking run in the seventh inning as the Toronto Blue Jays beat the Seattle Mariners 4-3 to prevent a three-game sweep.
The Seattle Mariners made one of the first big moves of the offseason by acquiring outfielder Teoscar Hernández from the Toronto Blue Jays in exchange for two pitchers.
Robbie Ray was tagged for home runs by Shea Langeliers, Cristian Pache and Nick Allen, and the Seattle Mariners hopes of hosting the AL wild-card series took a serious blow in a 10-3 loss to the Oakland Athletics.
Teoscar Hernández belted a pair of three-run homers over the Green Monster, two of the Toronto Blue Jays' eight homers in an 18-4 rout of the Boston Red Sox.