Seattle right-hander Logan Gilbert (1-1, 2.37) will return from the injured list and start for the Mariners on Monday against the Red Sox.
The Mariners are back at T-Mobile tonight amid their worst slump of the season.
The Bells are eyeing a sweep tonight after clinching their fourth-straight series win to open the season.
A former Mariner caused the club to dip under .500 for the first time in two months.
The D-backs send LHP Eduardo Rodriguez (1-3, 6.70 ERA) to the mound on Wednesday while the Mariners counter with RHP Bryan Woo (3-5, 3.07).
The Bells are back in town tonight for the start of a brief stint at home.
Mariners RHP Bryan Woo (5-3, 3.07 ERA) starts Tuesday against Diamondbacks RHP Brandon Pfaadt (7-4, 5.51).
College athletes will soon be able to be paid directly from their schools after a milestone settlement.
Stefan Frei had two saves for the Sounders.
Emerson Hancock (2-2, 5.19) pitches for the Mariners at Arizona.