This seems to be an issue for a few players in the universe because of some shenanigans towards the end of last season. @yuencg mentioned to me that there are two Kenta Maeda’s as well.
These minor league versions (the ones with the higher ID) will be merged with the original versions and player transactions will be rolled back for those two players as necessary.
If anyone sees any other duped players, please let me know! They shouldn’t be cropping up going forward…