Brown was at his rampaging best against Essendon in round 21, hauling in 16 marks and booting 4.6 in the Lions' 27-point win over the Bombers.
Heath Grundy looms as the most likely match-up for Brown but Malceski said the entire team needed to do its part.
And in all likelihood, that means Malceski will find himself standing in front of an oncoming Brown as the ball is bombed into the Lions' forward 50.
"It's often myself and Marty Mattner and Tadhg (Kennelly) and it is a big job," he said.
"Each week we've got to help out our key defenders, laying off if their forwards are going into dangerous spots. It is a big ask but it's something that we have to do.
"It's like Hally last week. I was blocking the hole for him and helping out 'Reggie' (Grundy) there, but it's going to happen again this week and hopefully no one gets injured doing it."
The Swans have won their past three games after suffering successive heavy losses to Melbourne and Geelong, and Malceski said their improved attack on the contested ball was a key factor.
He said the players had also taken the lead of retiring skipper Brett Kirk by improving another, less tangible, aspect of their approach to each game.
"The main thing is that everyone's caring about each other, which is one thing that we really wanted to focus on - that care factor in the group and it's definitely changed in the last three weeks," he said.
"When you go into form slumps, you just try to beat your man and not really help anyone else, but in the last three weeks, as a focus along with the contested ball, we've shown a lot of care for each other… it's been a real positive.
"Obviously Kirky's really passionate and he was one that really drove it, as well as Ryan O'Keefe and blokes have just jumped on board."
The Swans' 44-point win over the Bulldogs was achieved against the emotional backdrop of Kirk and coach Paul Roos' final game at the SCG but Malceski said there was no chance of a mental letdown against the Lions.
"Definitely not. We're in good form and everyone should be upbeat," he said.
"You see it around the club - you come in on a Tuesday morning, we had our meetings this morning and everyone's upbeat and chatting and laughing. It's just such a better feeling, compared to when you're losing."
