AFC Wimbledon manager Terry Brown branded Jack Midson his "talisman" after the striker's penalty double helped sink Bradford 3-1.
The Dons' leading scorer made it 20 for the season while Bradford had Craig Fagan sent off in the first half.
Midson tucked away his first penalty after Billy Knott was brought down, although Bradford levelled when Pim Balkestein put through his own net.
But Knott headed the Dons back into the lead before Midson crashed in penalty number two after a foul on Jason Euell.
"It's never easy playing against 10 men, you have to be patient and break them down," said Brown. "Bradford were resilient and worked hard. We kept playing our football.
"Jack has been phenomenal this season. He's more than a goalscorer - he's our talisman. He works hard and tackles back. His 20 goals could be the difference between us staying up and going down."