User blog comment:Coolautiz/Power Rangers Beast Morphers Cast Revealed/@comment-5038193-20180818211019/@comment-9346710-20180818222119

It's a three Ranger team at the start just like Ninja Storm, Dino Thunder, Jungle Fury, and RPM. They have Gold and Silver Rangers in the Beast Morphers team as well, but they're considered Sixth Rangers despite being the fourth and fifth members of the team.