by the time we pick in the 2nd round. I agree on the premise though; he would be the PERFECT second rounder. Let him go develop his game in Europe with plenty of PT, then come over to the U.S. in a year or two ready to contribute right away. I’m still not against taking him with our Boston pick if he’s available, assuming his whole goal is to play in Greece for a year then come over to the NBA on a rookie first round contract. In fact, that would help meter the influx of young talent on our squad. We could use this season to digest #6 and #18 (or #5 and #6!), knowing we have young assets like Calathes and Pekovic developing overseas that can come over in subsequent years.

1. Is he even eligible to be drafted this year if he signs with the Greek team prior to the NBA draft?
          a. If not, when would he be eligible to be drafted?
          b. If he is eligible to be drafted, how long would his NBA team hold his rights?

The rule with European players (as I understand it) is that they are eligible when either a) they declare themselves eligible, or b) at a certain age they are automatically eligible. After which the team that drafts them controls their draft rights in perpetuity, or until they trade those rights, but the rights don’t expire as far as I know.

I’m not sure the same thing is true of U.S. players.

Here’s another, related question. For U.S. players who are eligible, but don’t get drafted, they are free agents and can sign with anyone for as much as they can get. Would the same thing be true of Calethes if nobody drafts him? I think that’s unlikey IF he’s eligible, but it might create an interesting situation down the road. The way he might go undrafted is IF the drafting team doesn’t retain his rights past one year, BUT he’s still eligible for the draft. I doubt both of those things are true, because it creates a loophole, but this is not a situation I would assume the NBA has thought about much.