Chapman was with the Chicago Cubs as part of their World Series trip to 1600 Pennsylvania ... and stood directly behind POTUS as Obama cracked jokes about the team.
But as Obama broke down the final outs in Game 7 ... which Chapman pitched in ... B.O. never mentioned Aroldis by name.
Remember, Obama gave the exact same treatment to Hope Solo when the Team USA women's soccer team hit the White House in 2015 after winning the World Cup.
What do they have in common? Pretty disturbing domestic violence allegations.
Aroldis was accused of attacking his girlfriend and though he was never convicted of a crime, he did admit poking her and firing off his gun in anger.
Solo is accused of beating up her sister's son ... and that case is still in the court system.
Obama did crack jokes about other players ... typical dad humor stuff.
We'll see if Trump continues the tradition when he takes office.