In their loss they have gained an amazing guardian angel," Cheyenne Fisher tells PEOPLE about the daughters she shared with Braman, who died on Thursday, July 17 from cancer

Former Philadelphia Eagles linebacker Bryan Braman has died after a battle with a rare, aggressive form of cancer. He was 38.

Braman was 38 years old. His agent, Sean Stellato, confirmed his death, telling CNN, “Bryan Braman was a warrior in every sense – on the field and in life – facing every battle with unshakable grit and heart. His passing leaves a void not just in football, but in the spirit of every underdog who ever dared to fight.”