Brandon Marshall Behavior problems?

USA Today reports- Pro Bowl receiver Brandon Marshall, openly unhappy with the Denver Broncos, was suspended by the team through Sept. 5 for what coach Josh McDaniels called "detrimental" conduct. The warning to Marshall was issued prior to Wednesday's practice, McDaniels said. Marshall then went out during pre-practice warm-ups and walked while the rest of the team ran. He punted a ball away instead of handing it to a ball boy and swatted a pass thrown to him