stamina has been broken for a long time (see many other posts on this)
a 100 stamina player should NEVER be anything but green in a game, however, such players start not being green 17-18 minutes into the first half
players with 90+ stamina, being played at fairly fresh (starters), should average 33-35 mpg - however, they top out at around 26-28 - thats just a joke - that means that a player say with a 55 stamina (not that anyone would play those players) would be freakin exhausted in the first 2 minutes of the game, and would average maybe 10 mpg - just ridiculous