The Vikings hosted former 49ers cornerback Dontae Johnson on a free agent visit, Field Yates of ESPN.com tweets. Johnson, a 2014 fourth round pick, started in 16 games for the Niners last season. 
Johnson served as a reserve for the first three years of his career, but stepped up into a larger role in 2017. Going by the advanced metrics, it wasn’t necessarily a success. The 26-year-old ranked near the bottom of Football Outsiders’ yards allowed per pass and success rate. Meanwhile, he graded out as the third worst qualified corner in the NFL, per Pro Football Focus, as he placed 118th out of 121 possible players.
The Vikings lost a supporting cornerback this offseason when Tramaine Brock signed with the Broncos. Marcus Sherels has been retained with a new deal, but the status of 39-year-old Terence Newman remains up in the air. If signed, Johnson would provide Minnesota with some depth in the secondary.
He was absolutely terrible last year. Maybe a new team could put him a better situation but QBs and Offensive Coordinators were just targeting him all game long
Worst Corner in the league. Shouldn’t even be getting interviews. I was hoping the Seawhawks would grab him.
118th out of 121 is the fourth worst, not the third worst.