Cairney missed the game as he continues to struggle to knock off a knee injury that has plagued him from the start of the season, with his countryman McDonald taking over armband duties.
Slavisa Jokanovic had previously named Sone Aluko as the vice-captain as he took the armband whilst Tom Cairney was missing against Reading, but he has since moved to the Madejski Stadium leaving the role free.
And now it seems that the Fulham boss has rewarded the midfielder with the armband, something he is more than happy to do.
When asked about whether he is the new vice skipper, McDonald joked: "It seems that way, maybe not after today but when we win I might be next in line!
"It was good yeah, I enjoyed it - I like taking a lead as such and it's an honour to be captain for the game and will until Tom Cairney is back.
"It was really good and I was proud of the boys today, I thought we battled well and there was a lot of encouraging signs but at the end of the day it was two points dropped.
"If he's called upon me to be the captain then I'm more than happy to be the captain but if not I'm happy to be on that pitch to play for this team."