Lacey and Jackson were with Detroit last year.
The Minnesota Vikings have signed a pair of veteran free agents, cornerback Jacob Lacey and defensive end Lawrence Jackson.
The deals were done on Monday. The Vikings also waived punter T.J. Conley.
Lacey and Jackson were with Detroit last year. Lacey, who played three prior seasons for Indianapolis after going undrafted out of Oklahoma State, has six career interceptions. Jackson was a first-round pick by Seattle in 2008 out of USC who played two years for the Seahawks before leaving for the Lions in 2010. He has 19½ career sacks.
Conley was added to the roster in January but became expendable when the Vikings drafted Jeff Locke out of UCLA in the fifth round on Saturday. Locke could push veteran Chris Kluwe out of the job.