Kammala wannan jumla: A lokacin shekarar karshe na kwantiraginsa a kakar 2013-14, 'yan tsibirin sun yi musayar MacDonald zuwa Philadelphia Flyers a musayar dan wasan karamin Matt Mangene, zagaye na biyu a cikin
2015 NHL Entry Draft, da kuma zagaye na uku a cikin 2014 NHL Entry Draft a ranar 4 ga Maris, 2014. Flyers sun sanya hannu kan MacDonald zuwa shekaru shida, $ 30 miliyan kwangilar tsawaitawa a ranar 15 ga Afrilu. A ranar 5 ga Oktoba, 2015, Flyers sun sanya MacDonald a kan abubuwan da suka faru. A ranar 6 ga Oktoba, 2015, an cire MacDonald kuma an sanya shi ga ƙungiyar Flyers 'AHL, Lehigh Valley Phantoms.