Denver Broncos quarterback Jay Cutler has been diagnosed with Type 1 diabetes, his business manager Marty Garafalo confirmed Thursday night.

Cutler found out about two weeks ago that he was diabetic and needed daily insulin injections, Garafalo told The Associated Press.

He said Cutler was managing his disease and “in no way is his football career jeopardized.”

Some 21 million Americans have diabetes, meaning their bodies cannot properly turn blood sugar into energy. Either they don’t produce enough insulin or don’t use it correctly. With the Type 1 form, the body’s immune system attacks insulin-producing pancreatic cells, so that patients require insulin injections to survive.

Cutler, entering his third NFL season, threw for 3,497 yards and 20 touchdowns last season after supplanting Jake Plummer with five weeks left in the 2006 season.