Kansas City, Mo. ? Chiefs safety Husain Abdullah retired after seven seasons Monday, joining the growing list of players who have walked away from the NFL because of health concerns.

Husain had his fifth concussion this season, which sidelined him for five weeks. The 30-year-old player returned to help Kansas City beat Houston for its first postseason victory in more than two decades.

“There are numerous factors in my decision with personal health being foremost,” Abdullah wrote on Instagram. “I had a lot to contemplate. My goals moving forward are to be of benefit to my family, my community, my country and hopefully the world. Having a sound mind will be vital to accomplishing these goals.”