Stewart, a seasoned actor looking to find a job, was auditioning for the part of a regular major league pitcher, one that stayed in the major leagues and did not have to travel up 17 times in a season between triple-A and the major leagues.
Stewart was an airplane player. Quadruple-A.
AAAA- a group of players not particularly good enough to be major leaguers and too good to be in Triple-A. It’s an in-between group burdened with the maddening inconvenience of uncertainty.
That was Stewart. That has been Stewart for two years and it probably will continue to be him.