The Colts will work out free agent safety Marcus Gilchrist on Tuesday, Ian Rapoport of NFL.com (on Twitter) hears. Gilchrist could help the Colts fill the void as starter Malik Hooker undergoes a meniscus trim. 
For now, the club will turn to fourth-round rookie Khari Willis as Hooker’s replacement. Of course, they’ll still need reinforcements on the depth chart, and a veteran like Gilchrist could fit the bill.
In March of 2018, Gilchrist joined the Raiders on a one-year, $4MM with $3.85MM guaranteed. This time around, Gilchrist was unable to find a home before the season opener.
The Colts, in all likelihood, will audition other veteran safeties besides Gilchrist. Other free agents of note include Eric Berry, George Iloka, and T.J. McDonald.