Hamlin, a second-year player, collapsed on the field after making a tackle in the first quarter of tonight's game against the Cincinnati Bengals. He was administered CPR on the field, which reportedly included the use of an AED.
Hamlin was eventually transferred to University of Cincinnati Medical Center and is in critical condition, per NFL commissioner Roger Goodell.
"Hamlin received immediate medical attention on the field by team and independent medical staff and local paramedics," the NFL statement reads. "He was then transported to a local hospital where he is in critical condition.