Broncos receiver Brandon Marshall says he’s going to change.  Okay, fine.  But saying it ain’t doing it, and until he’s doing it we ain’t buying it.

Marshall talked at length on Thursday about his off-field issues, which have resulted in multiple arrests and most recently a serious arm injury that will cause him to miss up to four months.

Though even if he misses a full four months he won’t miss any of training camp, missing the entire offseason program is a far bigger deal than it was a decade ago.  Most of the offense and defense is installed during the non-contact (eye roll) teaching sessions from April through June, and Marshall will be behind the curve if he’s standing on the sidelines while his teammates are learning the plays that will be used in the 2008 season.

“Being truthful, it is time for me to grow up on and off the field,” Marshall said.  “I’m not just a guy that’s on the team, I’m a starter and have a lot of responsibility on this team.  We have goals that we’re trying to reach, and I play a big role in that.” 

Marshall also talked about the incident that caused his injury.  He initially claimed that he slipped on a McDonald’s bag and crashed into a television entertainment center.  He now says that he was wrestling with his brother and fell into the entertainment center while trying to avoid said McDonald’s bag. 

“It was just ‘horseplaying,’ what brothers do,” Marshall said.  “We’re adults, I just turned 24 Sunday.  He’s 25.  He’s my brother.  I love him to death.  We were just playing around like usual.  We always play around.  Maybe it will be in my next contract not to horseplay.  He lives with me in Denver.  He will continue to put deodorant to my under arm until my arm gets better.”

(Hey, at least he didn’t talk about who’s doing his wiping.  We’re not sure we could stomach that image.  Yeah, it’s really good he didn’t mention it.)

Marshall also expressed regret for a couple of past arrests, including a DUI that is still pending.

“There’s been things that I’ve been involved with as far as DUI.  Stupid.  It’s stupid.  But it’s one of those things that I have take that and better myself.  Learn from it.  It’s stupid.  I shouldn’t have been driving.  I could have hurt someone that night.  I could have hurt myself.  I have to be accountable for my actions.”

Speaking of stupid, there went his chances of an acquittal.

So, yeah, this guy has a lot of growing up to do.  It’s good that he recognizes it.  Moving forward, he only has to prove that the flesh is as strong as the spirit.