If they are 19-year-old I don't see anything shady. Probably he realized they were poor talents and decided to make space for more.
I did this myself 3-4 seasons ago when I started my last semi-generation. As I didn't have many spaces, I had to be firing all the low talents for a final amount of 50.5 million in fired 19yo riders. 10 riders fired out of 19. I wanted just the riders with the best projection, and for that you need to fire at least half of the riders you buy. I had the money for that, so why not?
I was very unlucky after all, not a single talent 5 among the 19 riders.