In baseball statistics, on base percentage (denoted by OBP) is a measure of how often a batter gets to first base for any reason other than a fielding error. It may be calculated as:
... Hemerken or Hammerlein, "little hammer."
In 1395 he was sent to the school at Deventer
conducted by the Brethren of the Common Life[?].
He became skilful as a ...