Leiter has been added to the Yankees' ALCS roster, Chris Kirschner of The Athletic reports.
The Yankees reinstated Leiter from the paternity list Sunday.
The Yankees placed Leiter on the paternity list Thursday.
Leiter could be in the mix for save chances after Yankees manager Aaron Boone said Wednesday that the team will get "creative" with the closer role going forward, Jack Curry of YES Network reports.
Leiter (3-4) hit a batter but allowed no hits and notched three strikeouts over 1.1 scoreless innings to earn the win in relief Sunday versus the Blue Jays.
The Yankees acquired Leiter from the Cubs on Tuesday in exchange for prospects Benjamin Cowles and Jack Neely, Jeff Passan of ESPN.com reports.
The Cubs activated Leiter (forearm) from the 15-day injured list Tuesday, Meghan Montemurro of the Chicago Tribune reports.
Leiter (forearm) threw a live batting practice Saturday, and manager Craig Counsell said that the right-hander will be activated from the 15-day IL during the Cubs' next road trip against the Orioles, Sahadev Sharma of The Athletic reports.
Leiter (forearm) threw a 30-pitch bullpen session Wednesday, Jared Wyllys of CHGO Sports reports.
Leiter (forearm) began a throwing program Friday, Andy Martinez of Marquee Sports Network reports.