The Mariners traded Stanek to the Mets on Friday for Rhylan Thomas, Will Sammon of The Athletic reports.
Stanek recorded a hold in a loss to the Angels on Monday, allowing an earned run on two walks over one-third of an inning. He struck out one.
Stanek (6-3) was charged with the loss against the Astros on Saturday, allowing two earned runs on two hits and a walk over two-thirds of an inning. He struck out one.
Stanek's exit from Sunday's game against the Angels after facing just one batter was due to back spasms, MLB.com reports.
Stanek left Sunday's game against the Angels after walking the first batter he faced in the eighth inning on four straight balls, Shannon Drayer of SeattleSports.com reports.
Stanek blew the save Sunday against Toronto, allowing one run on two hits and a walk with a strikeout over one inning.
Stanek (6-2) got the win over the Orioles on Thursday, firing a clean seventh inning during which he recorded two strikeouts.
Stanek (5-2) took the loss Sunday against the Twins, allowing two runs on two hits over an inning's work.
Stanek (5-1) got the extra-inning win over the Twins on Friday, firing a perfect 10th inning.
Stanek (4-1) got the win over the White Sox on Monday, allowing two hits and recording three strikeouts over a scoreless ninth inning.