from what I know he's simply just a hothead. much like Jose Guillen. except he's a much better hitter.
when he was with the Dodgers he didn't get along with Jeff Kent and called him a racist, or something like that. but Jeff Kent is an jerk, from everything I've heard. the deal was Kent didn't like Bradley, and Bradley didn't like Kent.
beyond that I haven't heard of anything that would make him a "team cancer" other than sensationalist arguments from forum posters, basing their entire opinion on his on-field tantrums. not just you, but on other forums as well.
then again, I don't really know him that well.
and the incident in san diego, from what I recall that was a long-running thing with that same umpire. the ump freaked with him earlier in the season, and then freaked with him again and he snapped. but I don't know all the details behind it.
Why would you even want that on your team? That isn't a baseball player, that is a sideshow act.
True, no one knows what goes on behind the scenes, but enough of it has spilled out into public view that you can make an educated guess this guy isn't all there.
Not getting a long with players, arguing with management and umps, not able to control himself....that speaks volumes. I don't see why anyone would need it spelled out for them. The proof is in the pudding.
The guy has only had three over 100 game seasons in his eight years in the Majors. Injuries play a factor too.
Cubs have an interest in him, though. Would he even think of coming to a 102-loss team?