At 8.1 and just 16% owned, Mikel Oyarzabal is the rare elite-ceiling striker priced like a mid-tier punt. Spain have the friendliest run of any contender on paper, which makes their penalty-taking, chance-converting forward the closest thing to a free differential in the premium bracket.
Ownership is the whole case. Almost everyone will captain Mbappé; almost nobody will captain Oyarzabal — and Spain's Group H draw of Cape Verde, Saudi Arabia and Uruguay is soft enough that the gap in expected points is far smaller than the gap in price or ownership.
He is also a back-door route into a fully fit Yamal in the knockouts: bank Oyarzabal's value through the group, spend the savings on a premium elsewhere, then pivot. With Yamal cleared for the opener, the whole Spanish attack just became more pickable.
The best differentials aren't hidden players — they're obvious players nobody dares to captain.
He belongs on the same shortlist as the chalk on the Matchday 1 captain board, just at a quarter of the ownership.
Sources: RotoWire — group-stage rankings · AllAboutFPL.