For many people, the holiday season can trigger depression, a common mental illness some view as a sign of weakness. But a growing contingency of NFL players have teamed up in a new national advocacy effort to talk about their own struggles with depression and other mental disorders and to help destigmatize these conditions, Fox News reports. Earlier this year, New York Jets receiver Brandon Marshall, who says he was diagnosed with borderline personality disorder in 2011, co-founded PROJECT 375, a Chicago-based nonprofit organization. Marshall received his diagnosis after seeking emergency psychological treatment in the aftermath of several violent incidents that put his football career in jeopardy.

Recently, Houston Texans running back Arian Foster, who’s dealt with alcohol abuse and depression, joined PROJECT 375. Marshall said Foster is the first of what he hopes will be a group of many athletes, entertainers and business leaders, committed to speaking candidly about their mental health as part of the organization’s expanding founders circle. According to PROJECT 375’s website, besides raising awareness and ending stigma connected with mental health issues, the nonprofit also hopes to raise money and support for people living with psychological disorders across the country. To find out more about this celebrity effort, check out @PROJECT375 on Twitter and Instagram, and use the hashtag #Iamaware to spread the word about mental illness.