Campbell, Atletico Madrid Top AP Soccer Poll
His Welsh club was second behind Atletico Madrid in the team vote.
Campbell's two headers caused the biggest upset of the season in any of the major European leagues. Slovakia striker Marek Hamsik is second after his double for Napoli gave manager Rafa Benitez a winning start against Bologna.
Luca Toni, who scored both goals in Verona's 2-1 win against AC Milan, is third.
Atletico Madrid finished first in the team rankings after beating Rayo Vallecano 5-0. Cardiff is second and Arsenal third.
Source: Associated Press