There’s a handful of states, including some that host NFL teams, that have deemed discrimination based on sexual orientation to be illegal.

The fact that these questions were asked provides some pretty compelling evidence that NFL teams don’t want gays in the locker room.

Of course any attorney for Te’o will have to make a distinction between Te’o's drop in performance as a draft day factor, and concerns about his sexuality – but if Te’o feels like he’s not welcome in the NFL, and thus sees fewer earnings, because of just the rumor of being gay, he might have a case to make.

What the NFL is doing at the Combine is looking at potential candidates for employment. Would anyone disagree with that?
In any other private sector hiring, questions concerning one’s sexual preference would be considered discrimination.
Of course, it would need to have evidence and be proven, probably in court. But in Manti’s case, if his draft stock dropped to say, the 4th round, I think he would have a case to say that kind of discriminatory questioning lowered his potential contract’s value.
There would be your case. Of course he won’t pursue it because it would lead to a blacklisting in the league.
Still think things favor the employees in today’s work world?