McHugh announced his retirement from professional baseball Monday.
Atlanta declined McHugh's (shoulder) $6 million option for 2024.
McHugh (shoulder) is set to begin a rehab assignment Tuesday with Triple-A Gwinnett.
McHugh was placed on the 15-day injured list Wednesday with right shoulder inflammation.
McHugh (3-0) picked up the win in the second game of Wednesday's doubleheader against the Tigers, striking out four batters over three perfect innings of relief.
McHugh will start Sunday's game against the Blue Jays, Kevin McAlpin of 680 The Fan Atlanta reports.
McHugh was activated from the 15-day injured list by Atlanta on Tuesday.
Atlanta is expected to reinstate McHugh (shoulder) from the 15-day injured list Tuesday, David O'Brien of The Athletic reports.
McHugh (shoulder) is expected to be activated from the 15-day injured list Monday, MLB.com reports.
McHugh (shoulder) told reporters before Saturday's game that he is feeling good and likely to return in the next couple of days, Justin Toscano of the Atlanta-Journal Constitution reports.