The moves were announced before Sunday's game against Toronto.
McGee missed two games after his wife gave birth to a daughter on Thursday.
Hellickson is coming back after arthroscopic surgery on his right elbow in January, and the move allows him to pitch during the All-Star break Monday in a minor league game at Pensacola.
He gave up one run and six hits in 4 1-3 innings against Kansas City in his first big league game this season on Tuesday.
- Sports & Recreation
- Tampa Bay Rays
- Jeremy Hellickson
- Jake McGee