Parkinson's diagnosis came after Favre began struggling with his right arm, he tells TMZ Sports

Brett Favre was diagnosed with Parkinson's disease in January after he began having trouble using his right arm and was unable to hold a screwdriver steady, the Pro Football Hall of Fame quarterback said in an interview with TMZ Sports.

Favre disclosed he has the disease Tuesday as part of his testimony to a congressional committee about a welfare misspending scandal in Mississippi.

Favre revealed the diagnosis to TMZ Sports in late August but requested it not be reported, the outlet noted in the story it posted Tuesday. He gave permission for his diagnosis to be reported after the congressional hearing.

Favre said he suspected something was wrong when his right arm would get “stuck.” He said he didn't notice a decrease in strength but was unable to hold a screwdriver with one hand. He said he notified his physician about the problem when he struggled to put on a jacket.