2018 A's Matt Olson & Chewbacca - May 25, 2018 Rickey Henderson 'Bobble-legs' - July 22, 2018 Italian Heritage Night - August 4, 2018 Jewish Heritage Night - August 8, 2018 Filipino Heritage Night - August 31, 2018 Korean Heritage Night - September 7, 2018 Sugar Skull - September 9, 2018 Sean Manaea 'No-Hitter' - September 21, 2018 Portugese Heritage Night - September 21, 2018