I really do not understand why so many people are obsessed with Gordon Hayward. I understand that he played for Stevens for 2yrs in college, but that does not necessarily mean he will perform any better on the Celtics than he is right now in Utah. And his numbers this year in Utah are certainly nothing to be enamored with. He is a solid player, but I wouldn't even trade Bradley alone for him, let alone Bradley + 1st Rnd pick, or Green + 1st Rnd pick, or some of the other severe overpayment packages people have been suggesting.
Player Comparison (2013-2014 season)
Hayward Per 36:
FG% .415 3P% .317 FT% 82.9 REB: 5.4 AST: 4.9 STL: 1.3 BLK: 0.7 TOV: 2.6 PF: 2.1 PTS: 17.0
Bradley Per 36:
FG% .441 3P% .365 FT% 73.3 REB: 4.8 AST: 1.6 STL: 1.2 BLK: 0.3 TOV: 1.9 PF: 3.1 PTS: 16.9
Efficiency: Bradley has the clear edge here, with a better FG% and 3p%. Hayward is more efficient at the FT line, but that is about it.
Rebounding: They are both good rebounders for SGs, but Hayward is a slightly better rebounder.
Assists: Hayward has the clear edge here. He is a much better passer than Bradley, dishing out about 3x the amount of assists Per36 that Bradley does.
Steals: Basically equal.
Blocks: Hayward is a slightly better shot-blocker than Bradley.
Turnovers: Hayward turns over the ball more than Bradley does, but that is also probably a result of him passing and handling the ball far more than Bradley does.
Fouls: Hayward is not as foul prone as Bradley is. Avery averages 1 PF per 36 more than Gordon does, but this is also probably a result of him playing far more aggressive defense, applying full court pressure, etc.
Scoring: Basically equal.
For the record, I am not always a big fan of per36 comparisons, because if the players being compared are not both playing starter minutes, than it can lead to a very misleading comparison. However, Hayward is averaging 36.1mpg, while Bradley is averaging 31.5mpg, so it makes for a very fair per36 comparison.
With that being said, my conclusion is that there is no reason Hayward should be worth Bradley plus a 1st round pick. I personally would not even trade Bradley straight up for Hayward. For one, Hayward will probably command a bigger contract than Bradley will on the FA market. (Well, depending on who you ask, but that seems to be the general consensus around here). Although even at equal money, I would rather have Bradley. It is not worth sacrificing Bradley's elite defense for a player who is a very similar scorer ppg wise, but is less efficient, and nowhere near as good of a defender as Bradley. The only thing Hayward does significantly better than Bradley is passing/ball-handling, which is not really worth the defensive compromise in my opinion. We already have an elite ball handler named Rondo, whom also happens to be the best passer in the game.