The Lions had a number of breakdowns in their secondary Sunday that resulted in six passing plays of 20-plus yards and four plays of 40-plus yards in a 35-33 loss to the Colts.
The Lions made a move Tuesday to try and help bolster that area of their defense by signing veteran free agent safety Tyrell Johnson, who was a second-round pick of the Vikings in 2008.
Johnson played in 49 games in four seasons with the Vikings and made 27 starts over that span. He has 123 career tackles with 10 passes defended and two interceptions.
He signed with the Dolphins as a free agent this offseason but was cut before the season began. The Lions worked him out earlier this season but did not sign him at the time.
The team released veteran safety
The team also filled the roster spot left vacant by rookie
Durham (6-6, 216) caught three passes in three games with the Seattle Seahawks last year. He played three seasons with
The Lions traded for Thomas the week leading up to the Jacksonville game. It took him a few weeks to learn the system, and for coaches to learn what he does well, but he said last week he was starting to build a rapport with Stafford.
Thomas had at least 44 receptions and 415 yards in each of his first three NFL seasons.
The Lions also added receiver Troy Burrell to the practice squad to fill Durham's spot.