He was rushed to the hospital after collapsing on the field during the game and was in critical condition as of Tuesday afternoon.
On Tuesday, the Chiefs joined other NFL teams in changing their Twitter avatar to a thumbnail that says “Pray for Damar” with his jersey number.
The Chiefs also canceled a media availability scheduled for Tuesday morning in light of Hamlin’s injury.
“Out of respect for Damar Hamlin and the Buffalo Bills organization, we are cancelling today’s media availability,” the team said in a statement.