From 1912 to 1933, there was a high incline in front of the then -high left field wall at Fenway Park, extending from the left-field foul pole to the center field flag pole (and thus under "The Triangle" of today). As a result, a left fielder had to play part of the territory running uphill (and back down). Boston's first star left fielder, Duffy Lewis, mastered the skill so well that the area became known as "Duffy's Cliff".
From 1912 to 1933, there was a high incline in front of the then -high left field wall at Fenway Park, extending from the left-field foul pole to the center field flag pole (and thus under "The Triangle" of today) As a result, a left fielder had to play part of the territory running uphill (and back down). Boston's first star left fielder, Duffy Lewis, mastered the skill so well that the area became known as "Duffy's Cliff".