A failed 2015 third-round pick out of Colorado State, Grayson never made a move to establish himself as Drew Brees' long-term backup in New Orleans.
The Saints chose Luke Mc Cown over him last year and Chase Daniel this year.
Sorensen was just cut on Monday, but the Vikings need his arm again after Teddy Bridgewater suffered a torn ACL and dislocated knee in Tuesday's practice.
Minnesota will surely look for an upgrade on Sorensen in the coming days.
For now, it's Shaun Hill, Sorensen, and UDFA Joel Stave. Orlovsky is probably most known for his infamous touchback with the Lions where he unknowingly ran out the back of the end zone. Head coach Dirk Koetter was Le Fevour's OC in Jacksonville in 2011 while QBs coach Mike Bajakian was his OC in college at Central Michigan.