2 teammates with the ball

[BktBallRef]

It's a throw-in pass, not a handoff.

7-6-1
The throw-in starts when the ball is at the disposal of a player of the team entitled to the throw-in. The thrower shall release the ball on a pass directly into the court, except as in 7-5-7, within five seconds after the throw-in starts. The throw-in pass shall touch another player (inbounds or out of bounds) on the court before going out of bounds untouched. The throw-in pass shall not touch a teammate while it is on the out-of-bounds side of the throw-in boundary plane.