Smalling, just days after his move from AS Roma, scored an own goal and was sent off as Al Fayha were beaten 5-0 at home by Al Raed.
The 34-year-old opened the scoring for the visitors on six minutes as he diverted a cross into his team's own net.
Smalling was sent off 10 minutes after halftime after denying the opposition a goalscoring opportunity. He was shown a straight red card for his actions.
Al Fayha stay bottom with Al-Raed's first win of the campaign lifting them to eighth.