Friends, the Yankees, Blue Jays, Dodgers, etc., are seeking playoff berths, not births, unless they are considering a most unusual promotion. Somewhere the ghost of Bill Veeck is considering the latter (Other suggestions, Mr. Veeck: live human sacrifice bunts; Labor Pains Day at the Ballpark).
Here's backup from the Merriam-Webster OnLine: birth | berth. Among other things, berth means a place or position. Birth means, well, birth.
From Bryan A. Garner (cue angelic chorus): berth - occasionally misspelled birth, sometimes with hilarious results.
Follow this link for the Google News Birth/Berth Hall o' Shame.
Let's face it: Available labor for copy editors is contracting. And how it pains Mr. Rewrite to imagine the errors he'll find after birth.
Enough puns for now unless the Community of Concern has suggestions. Let's clean it up.