Chris Mortensen sheds light on Dolphins LB Lawrence Timmons meeting with doctors to determine what is wrong after he was ruled inactive for going AWOL. (0:52)

After dealing with what one source described as "a personal matter" this weekend, Miami Dolphins linebacker Lawrence Timmons is scheduled to meet Monday with doctors to try to figure out what is wrong, per sources.

One source said Timmons is "doing much better [Monday] and wants to resume playing immediately" with the hope that he will practice this week. But first come the doctor visits.

The Dolphins are unsure what the issue is with Timmons, but one league source said he does not believe it is the early onset of CTE. "No one has ever seen anything like it," one source said.

The 31-year-old Timmons, entering his 11th NFL season, was dealing with his personal matter Saturday and returned to the team early Sunday morning before the Dolphins decided he wasn't in a good place to play against the Los Angeles Chargers. His streak of 101 consecutive starts was snapped.

Following the Dolphins' 19-17 victory over the Chargers, coach Adam Gase would only say that Timmons didn't play Sunday due to a coach's decision.

On Monday, he declined to discuss Timmons' future with the team.

"I'm kind of dealing with the guys that played,'' Gase said.

Gase declined to say whether Timmons might play Sunday at the New York Jets. But the coach said his only rules for players are to be on time and play hard.

His tolerance for a violation of those rules?

"What do you think?'' he said. "I've got two rules. It's not hard.''

Miami signed Timmons to a two-year, $10 million contract in March. He was the team's starting outside linebacker all throughout training camp and leading into the regular season.

Several Dolphins players said Timmons showed no signs he was dealing with any issues, and said he had been a model teammate during the preseason.

"He has been a team leader, always uplifting and bringing other guys along,'' safety Michael Thomas said.

ESPN Dolphins reporter James Walker and The Associated Press contributed to this report.