Ball 4 throw to first?

[Tru_in_Blu]

During my playing years I played against a team that would (occasionally) throw the ball to F3 after a BB. The timing of the throw was important. F3 would come up the line and as the BR passed, the catcher would throw a soft toss (ostensibly so the fielder's glove didn't make sound alerting the BR) who would then put the glove on the runner hoping they come off the base.