Super sweet moment at Camden Yards on Monday ... a young Baltimore Orioles fan was able to get his souvenir home run ball back after he threw it onto the field.
The adorable scene happened in the eighth inning of New York's game against the O's ... when a youngster received a ball that had been smacked into the seats by Yankees slugger Giancarlo Stanton.
The kid was pumped to get the baseball -- but not knowing its true value ... he ended up hurling it onto the field just seconds after he was given it!