Tony Romo Calls Out LB Jameel McClain As The Mike; McClain Disagrees

Quarterbacks call out the Mike linebacker all the time in football. The purpose is so the offensive line knows which defensive players to block, using the Mike as a starting point. ( Here's a quick, good explanation for the unfamiliar.) When Tony Romo identified Giants linebacker Jameel McClain as the Mike on one play today, McClain disputed his assignment.

Who to believe??