Graham confirmed the report, first made by AnnArbor.com, via text message, but he wouldn't give further comment. He then posted a message on his Twitter account, appearing to make reference to his recovery.
"I am not doing interviews with nobody until I'm back on the field," Graham wrote. "Everybody needs to worry about this lockout if anything. I got this!!"
Graham recorded 13 tackles, three sacks and two forced fumbles in 13 games before his season was cut short against the Dallas Cowboys in Week 14. Graham's injury initially was deemed to be to his ACL, but when doctors went in to repair the knee, it was decided that the more serious microfracture surgery was needed.
Speaking to reporters at a recent golf charity event, Graham said the lockout has helped his recovery.
"It's kind of benefiting me in my situation," said Graham, who deemed himself 80 percent recovered, according to the Inquirer. "But I know my other players want to get back and get to work and I'm all about that."
The Associated Press contributed to this report.