Life as Denver Broncos quarterback Jay Cutler once knew it has changed.

Cutler was recently diagnosed with Type 1 diabetes, a Broncos source confirmed Thursday.

While this is the most serious type of diabetes, making Cutler insulin dependent, the Broncos are confident it will not negatively affect his career performance. Cutler, who could not be reached for comment, has been taking insulin shots since he was diagnosed and has been participating in the Broncos' offseason workout program.

Several athletes have enjoyed long professional careers while playing with Type 1 diabetes, including former big-league baseball stars Ron Santo and Jackie Robinson and hockey'sBobby Clarke.

Among the former NFL players who played despite Type 1 diabetes were center Jay Leeuwenburg, who starred at the University of Colorado; quarterback Wade Wilson; and defensive back Mike Echols.

Type 1 diabetes used to be known as juvenile diabetes because it was more commonly diagnosed in children and young adults.  

However, there have been cases where people reached middle age before they were diagnosed. Cutler turned 25 on Monday.

Actress Mary Tyler Moore, 71, was diagnosed with Type 1 diabetes nearly 35 years ago.

Type 1 diabetics are made aware of the possible long-term effects on the kidney, heart and vision.

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