Unflappable [adjective]
Definition of Unflappable:
cool and calm
Sentence/Example of Unflappable:
The old saying that there are certain horses for specific courses doesn’t really apply to the unflappable Johnson, who seems to be able to succeed on all kinds of tracks in all sorts of conditions.
Unlike in those races, where the Kenyan looked unflappable as, one by one, he eased away from all of his challengers, there were moments in Sunday’s race where you could tell that things were not going to plan.