Franklin Gutierrez was scratched from Sunday's lineup with a sore neck.
Nelson Cruz had a monster day at the dish on Saturday, blasting two long balls and plating seven runs in a 14-5 rout of the Blue Jays.
Hisashi Iwakuma was staked to a huge lead early on Saturday and cruised through six innings of two-run ball in an easy victory over the Blue Jays.
Shawn O'Malley is starting at shortstop and batting ninth for the Mariners on Saturday.
Mariners recalled LHP David Rollins from Triple-A Tacoma.
Mariners placed SS Ketel Marte on the 15-day disabled list, retroactive to July 20, with mononucleosis.
James Paxton limited the Blue Jays to one run in seven innings as part of a 2-1 win on Friday.
Steve Cishek tossed a scoreless ninth inning against the Blue Jays on Friday for his 23rd save of the season.
Nori Aoki went 2-for-5 with a run scored against the Blue Jays on Friday.
Ketel Marte will be placed on the disabled list after being diagnosed with mononucleosis.
Taijuan Walker (foot) threw a bullpens session Friday with no issues.
Ketel Marte (illness) remained out of the Mariners' lineup Friday.
Mariners recalled INF Luis Sardinas from Triple-A Tacoma.
Mariners RHP prospect Nick Neidert fired five shutout innings Wednesday in a win for Low-A Clinton.
Mariners OF prospect Kyle Lewis will miss the remainder of the season after tearing his right ACL.