User blog comment:Ryuzakiforever/When Will FUNimation Catch Up?/@comment-26161031-20150202051955/@comment-2226235-20150202063057

That just wouldn't be possible. Funimation would need to get the rights to dub every episode all at once instead of getting them separately like they usually do, doing that many would take a long time to dub and a lot of the VAs would need to clear their schedules, which would be impossible. Most of the main cast in the dub are Funimation regulars who act in a lot of anime, not just One Piece.