Ja'Marr Chase Wins NFL Offensive Rookie of the Year

[Earendil]

Even though it's not the "official" award, looking back through the archives, the only year since 2000 where the AP award did not go to the same person as the PFWA award was 2016 when the AP award went to Dak Prescott and the PFWA award went to Ezekiel Elliot.

So I think this bodes well for Ja'Marr's chances.

EDIT: In 2017, the PFWA awarded it to two players, Kareem Hunt and Alvin Kamara.