Brown, who was substituted out of Sunday's game against North Melbourne in the second quarter with a left knee problem, heads the injury list.
"Yeah, look, precautionary. Knock to the knee. Don't want to take any chances," Buckley said of Brown's injury.
Vote for Collingwood's best three players from Sunday's loss to North Melbourne in the Magpie Army Player of the Year.
"It was a situation that you don't often find yourself in, where you're just projecting forward and you just want to get in to next week."
The injury status of Lynch, who landed awkwardly on his left ankle in a third-quarter marking contest, will also be closely monitored during the week.
Ben Reid (quad) and Travis Cloke (groin) are others the Magpies coaching staff will be keeping an eye on.
"The second half for us was all about management," Buckley said.
"It was a really weird feeling. We weren't thinking about how we were going to win the game, we were thinking about how we get our boys through."
Harry O'Brien was a late withdrawal through illness, although he trained on Saturday leading in to the game and looks likely to make his way back in to the side.
Luke Ball (calf), Ben Sinclair (shoulder) and Jamie Elliott (hamstring) are also chances to return in Saturday night's elimination final against Port Adelaide.
"We had some guys that potentially would be seen as on the fringe, or on the cusp, and they all performed pretty well today," Buckley said.
"Selection's going to be tough for us next week."
The Magpies finished in sixth position to earn their home final against the Power.
"We've ridden the highs and the lows. We've performed at times above expectations, we've dropped a few (games) that we'd rather not have dropped," Buckley said.
"But in the end, it all goes in to the mix and you end up where you end up. We're very clear about what our best football looks like. We're very clear on the focuses we need to do to get that and we're very confident in our ability to do so.
"We look forward to what the next month can bring."
