The Seahawks bolstered their cornerback depth on Thursday by signing Keydrain Calligan, an undrafted rookie from Southeastern Louisiana.
To make room on the 90-man roster, the team waived defensive tackle Thor Griffith, who had signed earlier in the week.
Calligan originally joined the Texans in May as an undrafted free agent but was released last week. In his lone season at Southeastern Louisiana, he tallied 39 tackles, four pass breakups, 2.5 tackles for loss, an interception, and a forced fumble, earning first-team All-Southland Conference recognition.
Standing 6 feet tall and weighing 200 pounds, Calligan began his college career at Louisiana-Monroe, later playing one season at Jackson State before transferring to Southeastern Louisiana.