"It's just day to day," coach Tony Sparano said. "We've got to see how they feel."
Crowder, the Dolphins' second-leading tackler, missed Sunday's game at Kansas City with a stiff knee. In his absence, Miami gave up a season-high 492 yards.
Allen, who pulled up limping at one point during the game, has a groin injury.
"There are not many things that keep me out of any games," Allen said. "That's just the way I like to think. But I'm all right."
The Dolphins would win the AFC East if they beat the Jets.