Might seem funny & strange, but that exactly what I used to do.
When removing the Non-Indigenous Red Worms from my collecting of their castings, I would keep the largest ones. Afterwards I would planet them in our gardens & cover them with a top, for a day or two, from predators. Since they simply replace numbers, with lesser biggest worms to eat the food, never really an interruption in producing castings & worm tea.

Then it occurred to me, they are a Non-Indigenous & Pervasive Species, so I stopped. Yes, it has occurred me, especially, when I find those same Red Worms had still found a way to escape my C-O-W Vermicomposter, heck, I am sure nothing is perfect, some escaped through the casting piles & worm tea I put down. Yes, I have found living Red Worms in bottles of their worm tea, weeks later.