"Damar has shown remarkable improvement over the past 24 hours," the Bills tweeted.
Hamlin, 24, has been in intensive care after collapsing on the field from cardiac arrest during "Monday Night Football" on Jan. 2.
There has been no official statement about what caused Hamlin's cardiac arrest.
It is in this exact moment, experts say, that a blow to the chest in the exact right place can launch an otherwise healthy person into cardiac arrest.
Thursday morning, Hamlin's teammate Kaiir Elam said in a tweet, "Our boy is doing better, awake and showing more signs of improvement."