He should have challenged it.
 
	 
 
	I've seen that same play ruled as a TD in college and pros.
 
	 
 
	If the receiver cannot maintain possession by himself it is ruled a drop.
 
	 
 
	If the defender knocks the ball out after a catch and 2 feet down, I've seen it ruled a TD.
 
	 
 
	Even Trent Green said it looked like a TD.
 
	 
 
	Was McD saving his challenges for his challenge piggy bank ? You have challenges USE THEM !!!