BATON ROUGE, La. -- LSU assistant coach Steve Kragthorpe has been diagnosed with Parkinson's disease and is relinquishing his duties as offensive coordinator, but is remaining on the Tigers' staff.

Kragthorpe, who was hired during the offseason, will remain as the quarterbacks' coach while offensive line coach Greg Studrawa has been elevated to offensive coordinator.

"Our concern is for Steve and his family," Miles said Thursday, the same day LSU held its first practice of fall camp. "We are all hopeful that he will have the opportunity to coach for a number of years and be at LSU and continue the things he has gotten started here.

"We will do whatever we can as an LSU football family to help Steve and his family during this difficult time."

Kragthorpe, 46, is the former head coach at Louisville (2007-09) and at Tulsa (2003-06). He gave up an assistant coaching position at Texas A&M last summer when his wife was diagnosed with multiple sclerosis, but decided to get back into coaching when LSU hired him last January.

He replaced Gary Crowton on the LSU staff after Crowton left to become offensive coordinator at Maryland. Kragthorpe has built a reputation for working well with quarterbacks, and LSU was looking for more production out of Jordan Jefferson in his senior season after the Tigers ranked last in the Southeastern Conference in passing in 2010.

"This is obviously a bit of a blow to myself, but by the same token we're a family of great faith and will be exactly where God wants us, and that is at LSU," Kragthorpe said. "I am very excited to coach the quarterbacks. ... I hope for the next 10, 12 or 14 years that I can be here at LSU coaching the quarterbacks. It is a place that I love. I love the team, the staff and working for Les."