The Yankees activated Chivilli (shoulder) from the 15-day injured list Thursday and optioned him to Triple-A Scranton/Wilkes-Barre.
Chivilli has put his shoulder issue behind him, but he will remain at Scranton/Wilkes-Barre, where he began a rehab assignment Wednesday. The 23-year-old made two relief appearances for the Yankees earlier this season, allowing one run with a 3:3 K:BB over 2.1 innings.