Editing Green Monster (section)

===Duffy's Cliff===
From 1912 to 1933, a {{convert|10|ft|m|adj=mid|-high}} mound formed an incline in front of the Green Monster,<ref name="Dickson">{{cite book|last1=Dickson|first1=Paul|title=The Dickson Baseball Dictionary|date=1989|publisher=Facts On File|location=New York, United States of America|isbn=0816017417|pages=[https://archive.org/details/dicksonbaseballd00dick/page/140 140]|url-access=registration|url=https://archive.org/details/dicksonbaseballd00dick/page/140}}</ref> extending from the left-field foul pole to the center field flag pole. This earthwork formed a "terrace", a common feature of ballparks of the day (where a dirt-surfaced [[warning track]] would normally be today), whose purpose was to make up the difference in grade between street level and field level, as with Cincinnati's [[Crosley Field]]. It also served to double as a seating area to handle overflow crowds, another common practice of that era.

As a result of the terrace, when overflow crowds were not seated atop it, a left fielder in Fenway Park had to play the territory running uphill. Boston's first star left fielder, [[Duffy Lewis]], mastered the skill so well that the area became known as "Duffy's Cliff".<ref name="Dickson" /> In contrast, rotund outfielder [[Bob Fothergill]], known by the indelicate nicknames of "Fats" or "Fatty", reportedly once chased a ball up the terrace, slipped and fell, and rolled downhill.

In 1934, Red Sox owner [[Tom Yawkey]] arranged to flatten the ground in left field so that Duffy's Cliff no longer existed, and it became part of the lore of Fenway Park.