The US National Football League is investigating allegations that a Miami Dolphins linebacker bullied a teammate.
Richie Incognito, 30, was suspended on Sunday night amid claims by 24-year-old Jonathan Martin's representatives.
Martin, 6ft 5in and 312lb (140kg), left the team last week to seek treatment for an emotional issue after reportedly being the victim of a prank.
The investigation casts a spotlight on a culture of hazing that has long been common in league locker rooms.
Miami Dolphins head coach Joe Philbin told a news conference on Monday at the team's training facility: "The NFL is going to conduct a review of the workplace.
"It's going to be comprehensive, it's going to be objective.
"As an organisation we are going to give our full and complete co-operation with the NFL."
Philbin said a decision had been made to suspend Incognito based partly on information from representatives of Martin, an offensive tackle in his second NFL season.
The team said in a statement: "We believe in maintaining a culture of respect for one another and as a result we believe this decision is in the best interest of the organisation at this time."