The Yankees designated lefty Aaron Laffey for assignment, tweets Marc Carig of the Newark Star-Ledger. They'd claimed him off waivers from the Mariners on Friday. Carig notes that Laffey was placed on optional waivers, meaning he remains on the 40-man roster and can be pulled back if claimed.
Laffey, 26, posted a 4.14 ERA, 5.1 K/9, 3.5 BB/9, 1.4 HR/9, and 50.9% groundball rate in 45 2/3 innings for the Mariners and Yankees this year.