I think it will primarily be McGowan, but I wouldn't be surprised to see BB shift it around a bit to confuse Manning. I could see Chung, Merwieather, Springs, AD and Guyton all drawing the assignment at times. I do think that we will have someone assigned to specifically target Clark at all times.
Keeping Manning off balance and being physical with him are the 2 keys to keeping him under control. Beat him up, and he's not the same. Rattle him, and he's not the same. Confuse him with different coverages (as we did with Rodney and Ty Law), and he's not the same. Those aren't easy to do, obviously. Let him get into a rhythm (BBDB with no pressure on the QB), and it will be a bloody mess for us.