Winnipeg Jets centre Mark Scheifele is in the NHL’s COVID-19 protocol, the team said, putting his availability for the Thursday night home opener in doubt.Scheifele joins Blake Wheeler — his linemate and the team’s captain — who tested positive and was found symptomatic on Tuesday.Wheeler is self-isolating and won’t play Thursday.Media reports say that Scheifele tested negative this morning and could come back tonight should a second test also be negative.