Tony Romo will not call Sunday’s game between the Arizona Cardinals and Los Angeles Rams for CBS because of COVID-19 protocols, the network said on Saturday.

Romo will be replaced by Boomer Esiason, who will call the game alongside lead announcer Jim Nantz and reporter Tracy Wolfson for the Week 17 game scheduled for 4:25 p.m.

It is unclear if Romo tested positive for coronavirus or had been in close contact with someone who has. Numerous networks have allowed broadcasters to call games from their homes during the pandemic. However, CBS said it was uncertain if it could have all of the necessary equipment set up in Romo’s home in time for the game.

Romo, 40, is the highest-paid NFL analyst, as the former Cowboys quarterback signed a 10-year, $180 million contract with the network in February.