I was watching early coverage of the 3rd round at WGC in Mexico. I believe it was the 3rd hole. Tommy Fleetwood and his caddie were discussing his shot. Tommy's bag was off to the side, when one of the other caddies walked over and looked (no touching) at his clubs. My guess would be to see what club was missing, thus being what club Tommy has holding. Tommy had honors, so the others had not played their shot. Is that legal? I do realize they did their homework during practice round and likely knew what club they would be hitting already. Just curious...
My google searched didn't net any clear results