Martin, a tackle, remained absent from practice Monday one week after he suddenly left the team because of emotional issues. Also missing was Incognito, a guard suspended indefinitely late Sunday by coach Joe Philbin for his treatment of Martin.

The 319-pound Incognito, a ninth-year pro, is white. The 312-pound Martin, who is in his second NFL season, is black. For much of the season they’ve played side by side.

The team and NFL continued their investigation into allegations by Martin’s representatives that he was bullied, and Philbin said Dolphins owner Stephen Ross asked league commissioner Roger Goodell for assistance. The NFL Players Association also planned to look into the matter.

“Every decision I’ve made, everything we’ve done in this facility has been done with one thing in mind,” Philbin said. “That’s to help our players and our organisation reach their full potential. Any type of conduct [or] behaviour that detracts from that objective is not acceptable and is not tolerated.”

It’s unclear whether coaches or management had any inkling of harassment between the players before Martin left the team, and Philbin declined to answer a question about the locker-room culture. Recent rumblings of dissension have also included complaints by young players that they’re pressured to pay more than their share when team members socialise together.

After beating Cincinnati in overtime Thursday, the Dolphins had three days off while the Martin story mushroomed. They returned to practice Monday and afterward found nearly 100 reporters and cameramen in their locker room.

Teammates praised both Incognito and Martin and expressed regret regarding their absences, but said it was time to get on with business.

“The only thing affecting us is we can’t even get dressed,” said receiver Mike Wallace as he surveyed the media throng.

Wallace said he found Incognito to be intense but a good teammate. Newcomer Bryant McKinnie agreed.

“When I got here, he was a guy who had everybody laughing and told jokes,” said McKinnie, a tackle who joined the team two weeks ago. “I didn’t really see the side being portrayed right now.”

Hazing of young players has a long history in sports, but Incognito’s treatment of Martin raised questions about whether coaches or teammates should have intervened.

“It’s not a thin line. It’s pretty obvious stuff that shouldn’t be crossed,” Tennessee Titans cornerback Jason McCourty said. “You would hope if stuff was getting out of hands, there were guys in the locker room who would step up and maybe nip it in the bud before it got out of control.”

Before being suspended, Incognito posted several tweets saying he wanted his name cleared.

“Three things cannot be long hidden: the sun, the moon, and the truth,” Incognito tweeted, quoting Buddha.

Agents for the two players didn’t respond to requests for comment. Martin is with his family in Los Angeles for counseling.

Incognito, who’s in the final year of a $13 million, three-year contract, has long had a reputation of being among the NFL’s dirtiest players. During his first four years, he led the league in penalties for unnecessary roughness, and the St Louis Rams got fed up with his undisciplined play and released him during the 2009 season.

“There’s certain people out there who are just punks, and he wants to be that kind of guy,” former Seahawks and Lions defensive end Lawrence Jackson said Monday. “But because he’s a lineman, he gets away with a lot of stuff that people don’t see ... Incognito is way worse than anybody I ever played against.”