... and Barkleys, that crossing over into the unknown is generally a bad idea for pro athletes?

For every Herschel Walker going into MMA or making a bobsled team, there's a Brock Lesnar trying to play in the NFL, or Michael Jordan whiffing at a fastball in the minor leagues.

Now, adding his name into the "crossover athlete" discussion, is Miami Dolphins receiver Brandon Marshall. 

He can't be serious, right? 

Unless he's trying to get the attention in Miami away from Dwyane Wade, Chris Bosh, and LeBron James and onto him, why is he doing this?

He claims he could have played shooting guard at the NBA level, but his coach disagrees.

"I've seen him jump—
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