A practicing Muslim, Abdullah turned down a contract offer from Minnesota to speak at mosques across the country along with his brother, former Cardinals defensive back Hamza Abdullah.
The two of them then journeyed to Saudi Arabia.
Abdullah entered the NFL as an undrafted free agent in 2008. The former Washington State star made 24 starts in 54 games over the next four seasons for the Vikings, making 167 tackles and two sacks with four interceptions. He also was a contributor on special teams.
The Chiefs have little depth behind starting safeties Eric Berry and Kendrick Lewis.
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