FS Abdullah retires, citing concussion history

Free-agent safety Husain Abdullah announced Monday that he has decided to retire, posting on Instagram that his health was the primary deciding factor after suffering five concussions in his seven-year career.

Abdullah thanked the Minnesota Vikings for signing him as an undrafted free agent in 2008 and called his three seasons with the Kansas City Chiefs "the most enjoyable football experience in my entire life."

The 30-year-old Abdullah had been a valuable defender for the Chiefs since he joined the team as a free agent in 2013. Kansas City used Abdullah, a part-time starter over his three seasons, in a variety of roles. He was effective as a blitzer, though he had just a half-sack with…