Like Topps Total, T206 comes out in waves. The second wave was released in June and ended with a print run of 33,914 packs. Each pack has eight base cards, so that means 271,312 base cards were printed. Divide that among the 50 cards on the checklist and it gives you 5,426 copies of each card (assuming that there aren't any short prints).
Just one card in the second wave belongs to a Cub.