The Vikings signed two defensive backs, Derron Smith and Duke Thomas, from San Antonio of the recently folded Alliance of American Football on Friday.
Smith, a safety, was drafted by Cincinnati in the sixth round in 2015 out of Fresno State. He played two full seasons for the Bengals and was waived early in the 2017 season before signing with Cleveland, where he played in seven games. In 38 NFL games, he had 10 tackles. For San Antonio, he had 21 tackles in eight games.
Thomas, a cornerback signed with the Houston Texans as an undrafted free agent out of Texas in 2016 and was also with Philadelphia, San Francisco and Dallas.