Weems signed a minor-league contract with the Nationals on Sunday, Maria Torres of The Athletic reports.
Weems made seven relief appearances for the Athletics and Diamondbacks during the 2021 campaign but struggled, as he allowed 10 runs in 5.2 innings. The right-hander will be invited to major-league camp once it gets underway. Weems could make some big-league appearances while serving as organizational depth in 2022, but he'll presumably serve in a low-leverage role if he's called up.