Insane Blue wroteIf the 3rd baseman had the ball go off the glove without any possession then 2 bases from the time of the throw.
If there was any possession and then they lost it and it goes into dead ball territory then it is 1 base
An interesting difference in ASA/USA is that a thrown ball going out of play is 2 bases from position of runner at the time ball left the fielder's hand.
On loss of possession that goes out of play, it is one base from position of the runner at the time the ball left the field.