A unexpected situation happens with Brett, a normal delivery, has just broken in love. One day, he discoveries that he has 533 children, which is the results of the anonymous sperm donations. Besides, he also gets into trouble with his 142 children.
Calling Delivery Man a "comedy" is a bit of a stretch, because it's rarely funny. Dumb, yes, but not in a way that's worthy of more than a half-hearted chuckle.
The sheer cognitive dissonance between being told that this character is nice and the baffling deception he pulls on hundreds of people is agonizing, and it makes the story horribly anti-dramatic.
Vaughn never quite convinces as the perpetual slacker in this blue-collar family (he doesn't even look like he's from the same gene pool) and too many of the characters feel puppeteered into place; you can see all the strings.
A golden comic premise, directed to dross by Ken Scott, who also made the Canadian original ("Starbuck," from 2011) on which this Vince Vaughn vehicle is based.