I don't believe that production was sustainable, but even if it is, scoring at that rate is the minimum for a starting MLS striker on a competitive team. You need a guy who can score like that PLUS do other things like hold up the ball, dribble, pass, press, etc.
We dont know about his production sustainability. There isnt enough data.
Zardes is the worst soccer player Ive ever seen and hes playing in a cup final.
I rest my case.