AP Photo/Lynne SlodkyMark Richt, former Georgia and Miami football coach and current ACC Network analyst for football, announced that he has Parkinson’s disease.According to the Parkinson's Foundation website the disease can be described as "a neurodegenerative disorder that causes predominately dopaminergic ('dopaminergic'), neurons in a particular area of the brain known as substantia nigra."Possible symptoms include tremors and bradykinesia as well as limb rigidity and gait and balance issues. Although Parkinson's disease is not fatal, it can lead to serious complications.Richt, 61 led the Bulldogs between 2001-15, before returning to Miami from 2016-18. Richt won 10 bowl games and went 171-64 during his coaching career.Richt is a two time SEC Coach of the Year, and one-time ACC coach of the Year. He also won the Walter Camp Coach of the Year Award for 2017. Richt's teams were in the top 10 on the Associated Press poll seven different times.After the 2018 season, Richt retired and joined ACC Network for 2019. Richt declared that he had suffered from a heart attack in the morning, but that he was doing fine.After the news about Richt broke, Twitter was full of well-wishes. Below are some examples from different media members.Richt was previously a backup quarterback at Miami between 1978 and 1982. Richt was a graduate assistant for Florida State between 1985 and 1988 before moving to East Carolina in 1989 as the offensive coordinator.Richt returned to FSU as the quarterbacks coach (1990-93) and then became the offensive coordinator from 1994-2000. He was a coach for Charlie Ward (quarterback) and Chris Weinke (offensive coordinator), and was a member of the 1993 and 1999 national champions teams.Richt's book, Make the call: Game-Day Wisdom to Life's Defined Moments, will be published on August 31.