NFL fans tuning in to Sunday Night Football expressed concerns after catching a glimpse of NBC color commentator Cris Collinsworth’s hands.

As a game between the San Francisco 49ers and the host Buffalo Bills was called in cold and snowy Orchard Park, New York, cameras occasionally panned into the booth, showing Collinsworth alongside play-by-play man Mike Tirico.

Some footage showed that the tops of Collinsworth’s hands appeared to be darker than his fingers or the rest of his hand.

It’s unclear what might be causing the discoloration – or whether there are serious concerns people should be concerned about.

Several fans posted their concerns about the longtime commentator on social media and advised someone at NBC to get him something to keep him warm.

Sports content creator Brianna Pirre tweeted: “Can we get Cris Collinsworth some gloves or something? The man’s hands are blue?”

NFL fans expressed concern about NBC commentator Cris Collinsworth’s (left) hands

A close-up of Collinsworth’s hand as shown on the Sunday Night Football broadcast

SNY sports reporter Chris Williamson said: “I hope Cris Collinsworth is OK.”

Another user wrote: “Why does Cris Collinsworth’s hand look like Dumbledore’s cursed hand in Half-Blood Prince?”

“Get Cris Collinsworth some gloves… his hands are dead!” another user added.

Another user, mocking Collinsworth’s commenting style, wrote: “Here’s a guy whose hand might be dead.”

This isn’t the first time this season that the NBC broadcast veteran’s hands have caused concern among fans.

In early October, at a Sunday Night Football game between the Pittsburgh Steelers and Dallas Cowboys, Collinsworth’s hands appeared to be a similar color.

Collinsworth, the former Cincinnati Bengals wide receiver, has been in the broadcast booth on NBC’s Sunday Night Football for 16 seasons.