What was that? Tony Romo, lead NFL analyst for CBS, raised some eyebrows during the first quarter of the Chiefs-Bills game when he was heard grunting on the broadcast on Sunday. The former Cowboys quarterback, who was explaining a defensive holding call on Bills cornerback Cole Bishop, pointed out two potential infractions on the replay before letting out a groan-like noise. The broadcast didn’t show Romo and play-by-play announcer Jim Nantz in the booth, and instead switched back to the game —