Nicki Jhabvala of The Athletic provided video of Fangio's arrival at Tom Benson Hall of Fame Stadium and another of him on the field during warm-ups:
Fangio, 60, is in his first year as the Broncos head coach. He led the No. 1 scoring defense in the league as the Chicago Bears' defensive coordinator last season.
Smyth also tweeted that a team physician took Fangio to the hospital, and ESPN's Adam Schefter provided more insight.
Notably, the reporter wrote that Fangio "spent a good part of the day in a Cleveland hospital with a kidney stone" and that it had not passed.
However, Fangio apparently felt well enough to attempt coaching the team Thursday and even told Mike Klis of 9News pregame that he is "good."
As Klis also wrote, Fangio hasn't had a head-coaching gig in 40 seasons. He'd been a defensive coordinator for six teams over 19 seasons but never received a head-coaching opportunity until the Denver gig opened up.
Waiting decades for a chance and getting one only to be hospitalized literally hours before the first game is horrible luck, but the fact that Fangio is even out there is remarkable. Mark Kiszla of the Denver Post was clearly impressed:
Denver's next preseason game will take place next Thursday at the Seattle Seahawks.