A torn pec is highly unusual in football. It's a regular thing in American football as it's a big muscle and it takes some torque to tear it. This one doesn't fall under the "knackered and got injured" category is my thought.
It is but coaches have been caught in the NFL for violating a ban. Would consulting with a rival after being put on Garden leave be a criminal offence? Serious question as I do not know UK labour laws.