The third set (in the order of my posting, not release) from Frontier International in the Rookies & Young Stars line is for the Lions. This and the Carp set were the first two to be released, followed by the Buffaloes and BayStars.
Due to the low print runs, I'm somewhat inspired to pick up base sets for myself! At 8000 yen for an unopened box with one autographed card and a complete set, I won't take that plunge. But supporting diversity in the card market should be encouraged, right?