NFL free agent C.J. Gable has joined the NOH8 Campaign, the silent protest which raises awareness and funds for gay rights causes, including ending California's 2008 voter-approved gay marriage ban, Proposition 8.

The 24-year-old Gable was signed as an undrafted free agent by both the Denver Broncos and the New Orleans Saints in 2011 but was later waived by both teams. He played college football for the University of Southern California Trojans before joining the NFL and was a 2005 Parade High School All-American.

The NOH8 Campaign, which is helmed by photographer-activist Adam Bouska and his partner Jeff Parshley, photographs celebrities and everyday folks with their mouths duct taped and the campaign's familiar “NOH8” slogan often written on one cheek.

Gable is wearing a white t-shirt in his photograph and several tattoos on his tricep are visible.

Gable is not the first NFL athlete to pose for the campaign. Also joining the campaign are New England Patriots safety Bret Lockett, New York Jets cornerback Antonio Cromartie, Carolina Panthers linebacker Nic Harris and Arizona Cardinals linebacker Isaac Keys.

Former NFL defensive lineman Esera Tavai Tuaolo, who announced in 2002 that he's gay on HBO's Real Sports, also recently posed.