Former Titans linebacker Tim Shaw announced Tuesday he has been diagnosed with ALS.
Shaw, 30, played for the Titans from 2010-12.
In a video on the Titans website, Shaw challenged the Titans and Penn State, his alma mater, to take the "Ice Bucket Challenge." It shows him wearing a Penn State T-shirt and dumping a cooler of ice water on his head.
"I'm Tim Shaw. A year ago I was playing NFL football. I have recently been diagnosed with ALS," Shaw said in the video. "I am here today to stand up and fight with all of you against this disease.
"I want to challenge the Tennessee Titans organization, coach James Franklin and the Penn State football team, and my Clarenceville (Michigan) community. Let's do this."
A fifth-round pick of the Carolina Panthers in 2007, Shaw became a special teams ace in the NFL. He also played for the Jacksonville Jaguars (2008) and Chicago Bears (2009). He played in 48 games for the Titans and was their special teams captain in 2011 and 2012.
Often referred to as "Lou Gehrig's Disease," Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord.
According to the ALS Association, the progressive degeneration of the motor neurons in ALS eventually leads to death. When the motor neurons die, the ability of the brain to initiate and control muscle movement is lost. With voluntary muscle action progressively affected, patients in the later stages of the disease may become totally paralyzed.
The Ice Bucket Challenge is helping to raise both money and awareness for the disease. The ALS Association said it received $15.6 million in donations between July 29 and Aug. 18 from people who took videos of themselves getting doused with a bucket of cold water.
Earlier this month, Shaw posted a message on Twitter: "What you SAY matters! What you DO matters! Stop floating around this life like it doesn't. #live on #purpose"