Kammala wannan jumla: A ranar 25 ga Yuni, 2016, an zabi Allison a zagaye na 2 na
2016 NHL Entry Draft, na 52 a gaba ɗaya, ta Philadelphia Flyers. An ba shi zaɓi don fara wasan hockey na ƙwararru kafin ya kammala aikinsa na kwaleji, amma ya zaɓi ya ci gaba da wasa a WMU, yana mai da hankali kan sha'awar sa ido kan raunin ACL, da kuma damar da aka samu don yin wasa a gasar NCAA Division I Men's Ice Hockey.