Who wears the "A" on defense?

[Shady Machine]

Yes, we've had three A's for a few years now. Atleast since the start of the lockout shortened 2013 season when Kunitz was named as an alternate captain. Malkin has been the other permanent 'A' while Orpik and Kunitz rotated the other 'A'. Some others (like Dupuis, Cooke in the past had 'A' for some games etc.) might have wore the 'A' when one of those have been out.

We may have had three 'A's even before that since didn't Kunitz just take it over from Staal? Don't remember exactly how it went but I believe Malkin, Orpik and Staal were the three alternates before the lockout shortened season. Staal obviously got traded and Kunitz got the open 'A'.

This is correct.