The instructional league is similar to the Arizona Fall League, which hones the skills of players close to major league ready. You can see the entire list here.
Most players come from low A Lexington and rookie league teams like Idaho Falls and Burlington with a smattering from High A Wilmington. However, former AAA reliever Miguel Almonte is also on the list. Almonte even pitched a few innings for Kansas City in 2015. He was seen as a top prospect with a high 90’s fastball, but struggled as a starter at AAA.