Need to photoshop a water polo ball into this old photo from the South Side

Some more "Pittsburgh People"!

Title : South Side Open Air Pool
Creator : Pittsburgh City Photographer
Date : August 27, 1924
Identifier : 715.245452.CP
Description : A view of a group photo of men (possibly lifeguards) at the South Side Open Air Pool.

Subject : South Side (Pittsburgh, Pa.)
Source : Pittsburgh City Photographer Collection, 1901-2002.