NFL, sports world reaction to injury to Bills' Damar Hamlin
[CBS Sports] Bills say Damar Hamlin suffered a cardiac arrest vs. the Bengals. His heartbeat was restored on the field, and he is currently listed in critical condition at the UC Medical Center. : r/nfl
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Full coverage: Bills' Damar Hamlin suffers cardiac arrest vs. Bengals - Los Angeles Times
What happened to Damar Hamlin? Here's what we know about the Buffalo Bills player's cardiac arrest - CBS News
NFL star Damar Hamlin's family thanks fans for support after his collapse - BBC News
Doctors say Bills S Damar Hamlin's 'substantial improvement' marks 'a really good turning point in his ongoing care'