Question

Assume that the quarterback has a valid employment contract with the football team, how would it be determined whether or not the team may, without liability, fire the quarterback for running around with his pants down?

Answer 1

Since you provide no further information,

In every contract there will always be a section that state the term of termination.
The lawyers could connect the act of his running around with his pants down and connect it to the available contract of termination

hope this helps