I see no problem on it....
No way in hell, Cotto isnt very tall, but he is fairly stocky. He moved to 147 because it was killing him to make 140. Cotto is one of my favorite five fighters but he stuck at 145 in the Paq fight for a reason, that was as low as he felt would be comfortable with.
you need to watch some more boxing if you are asking questions like this man, sorry. in short, no he cannot. i am sure he can get down to 135, but would be in no shape to get in the ring. even when he fought in the olympics it was at junior welter.