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

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

Bryan Braman, who played at WT and was a seven-year NFL veteran and Super Bowl 52 champion, died Thursday, according to his agent.