Just to give people some perspective, because everyone here is just throwing around vague qualifiers like "decent" and "good" and "talented" without backing them up, here are some Jeff Green facts on the season.
-He is a bad rebounder. You can argue it is improving, but it is still bad. His rebounding percentage is HALF the league average for small forwards. 6 per 48 instead of 11 per 48.
-He turns the ball over too much. He has more turnovers than steals and blocks COMBINED for the season. Hell, he has more turnovers than assists and steals combined for the season. That is not acceptable.
-The turnover numbers are even more startling when you realize that Jeff Green is actually a good defender, as other people in this thread have noted. He is getting a good number of steals and blocks (yes, his per game averages are low, because he doesn't play a lot of minutes. If you adjust for minutes played, he is getting steals and blocks at an above average rate). He also doesn't foul that much. So he is a good defender.
-He is not passing well. He has never been a great passer, but he has usually been at least average in terms of assist ratio and percentage. This season he is pretty abysmal. He is getting 0.8 assists per game; if you adjust for minutes played, the league SF average for assists is 1.4. I know that isn't a huge difference, but considering that he is also averaging 1.4 turnovers per game WITHOUT adjusting for minutes you realize what the problem is.
-His shooting is terrible. A hair below 42% from the field, 33% from 3, and a TS% of 50.5%. The league average for small forwards in those categories? 47%, 35%, and 53%. Also, he only gets 1.13 PPS , well below the league average of 1.22.
-Although he is a very good free throw shooter, he doesn't get to the line very often. He is overing just around the league average in free throw attempts per game, and considering that so far free throws are the only way he can score efficiently he needs to draw more fouls.