The guy may be a total dick but bullying a 304lb guy sounds odd to me. Incognito did things like guess passwords and log into Facebook and make posts on Hard Knocks but I do that at work when one of the girls use my computer and forget to log off.
Football is very similar to the military and takes a full team effort. If the whole team isolated Martin then you may find he didn't fit in. If you think that sounds bad then you have never been around a bunch of women and watched them when you hire a new person that doesn't fit with the group,,,,it's ugly