The Vikings opted to keep two quarterbacks — Cousins and Sean Mannion — on their 53-man roster in 2019 and waived Sloter during final cuts.
The Georgia native has since made stops with the Cardinals, Lions, Bears and Raiders, but has not appeared in a regular-season game.
Sloter turned in strong performances in preseason games with Denver and Minnesota, building a rapport with fan bases in both locales.
In 2017 with the Broncos, he completed 31 of 43 passes for 413 yards with three touchdowns and no interceptions for a passer rating of 125.4.
The following preseason, Sloter completed 41 of 56 passes for 366 yards with four scores, no interceptions and a passer rating of 114.1. In 2019, he went 39-for-51 with 443 yards four scores and one interception for a passer rating of 120.0.
Sloter originally began his college career at Southern Mississippi before transferring to Northern Colorado. He completed 197 of 318 passes for 2,665 yards and 29 touchdowns for the UNC Bears in 2016.