In August, former Cal football fullback Eric Stevens was diagnosed with amyotrophic lateral sclerosis (ALS) at age 29, and a number of NFL players are now rallying around him.

Stevens, who played at Cal from 2008-2012 and spent one season in the NFL with the then-St. Louis Rams, is currently a firefighter in Los Angeles and was diagnosed with the rare disease (also known as Lou Gehrig's disease) not long after getting married. There is no cure for the disease, and life expectancy after diagnosis is just 2-5 years.

The family announced the news of his diagnosis on Instagram, and also set up a GoFundMe page with all proceeds going to Stevens' treatment. On their GoFundMe page, the family writes that ALS treatment can cost patients up to $300,000 a year.

The Los Angeles Fire Department also shared news of Steven's diagnosis in an Instagram post and encouraged people to donate to the fund.

In addition, several NFL stars including Dallas Cowboys quarterback Dak Prescott and Detroit Lions receiver Marvin Jones took to social media to express their support for the Stevens family.

"Ready & Support my brother & Former Teammate!" Jones, who played at Cal from 2008-2011 wrote on Twitter.

Other former Cal stars also sent their prayers to Stevens and encouraged people to donate.

"My boy Eric Stevens was just diagnosed with ALS," former Cal linebacker Mychal Kendricks, who is currently with the Seattle Seahawks, tweeted. "Unfortunately there isn’t a cure, but your support will help with his treatment. It would mean the world to me, him and his family, if you guys can join us in the fight to keep fighting."

Justin Forsett and Brian Schwenke were among the other former Cal players who also expressed their support for Stevens on social media.

Eric Ting is an SFGATE digital reporter. Email: [email protected] | Twitter:@_ericting