it's just not in his nature. it's like waiting for greg stiemsma waiting to turn into hakeem olajuwon, or myself waiting to get an nba call up - it's just not going to happen because that person in incapable of doing it.
he is not a good passer. never has been. he is not a good rebounder. never has been. check out this page: http://www.basketball-reference.com/players/g/greenje02.html
he's putting up the exact same numbers he has his whole career. he's just not capable of becoming the player you think he can be.
if you look at his game logs throughout his whole career, he will only ever put up about 16 points per a game BUT he will do it in about 35 minutes of game time. he's getting 22 minutes a game - he's giving you all he has (he just doesn't have that much).
here are his game logs: http://espn.go.com/nba/player/gamelog/_/id/3209/year/2010/jeff-green
do the math. he can definitely put together a bunch of bad games. that's not even a question. throughout his career he will rarely put together 3 good games in a row - and if you think he does, i will ask you how many minutes he played to pad his stats, and ask you to divide the number of minutes so as to get what that output is every 22 minutes.
the thing is that jeff green needs to be passed the ball by another player while he is two feet from the hoop so he can score, OR while he drives right (which is really one of his only moves) the other player needs to foul him, so that he can get to the line for some easy free throws. if he drives right and doesnt get fouled, he will miss more often than not.
and just by the by, his other moves are standing in the corner waiting for someone to pass him the ball so he can shoot the three, and driving left and (like he often does when driving) clumsily barging into anyone there and tossing up a prayer. he rarely works outside of this.
he's never been a good player. his position adjusted winscore throught his whole career has been pretty much the same. he's more or less the worst small forward in the league, but like all clueless gm's do, the public thinks that if he can score 16 points in 35 minutes, that means he's a good player... without realising the game of basketball is so much bigger than that one stat.
check out his position adjusted winscore per 48: http://www.thenbageek.com/players/13-jeff-green
it's pretty much the same his whole career. to be starter material you need to be at least .09 per 48 minutes, and he is soooooooooooo far off that, and always has been. he looks like a basketball player - he's tall, long and athletic... but he can't play very well.