I'm not sure Tyrann Mathieu can project as a S with his size and weight. (5-9, 175)
Even as a corner he will be considered small for NFL standards.
"It's little bit like the description of pornography from years back. It's hard to define it. But you know what it is at the end of it. It's hard to define it. I think you know who is more physical. Often times you see that in the fourth quarter. A lot of time the team on the other side feels it. We pride ourselves on being a physical football team. It's important to us. It's an important time of the year to lay that foundation." - Coach Garrett