The TinCaps' charity cost them a sweep of the Kane County Cougars on Saturday before 7,013 fans at Parkview Field.
In Kane County's 5-3 victory, four of the runs scored originated with either a TinCaps error or walk.
The Cougars scored in the third inning after Oliver Zapata walked, scored again in the fifth when Zapata reached on an error, and two of the three eighth inning runs were courtesy of walks to Jeimer Candelario and Rock Shoulders.
TinCaps pitchers gave up five walks, and Kane County also took advantage of three Fort Wayne errors.
TinCaps catcher Dane Phillips had two RBI. He had a run-scoring double in the first inning, and his ground out to second base in the eighth also scored a run.
Fort Wayne (12-9), which had a three-game win streak broken, will be home to Clinton on Sunday, beginning at 3:05 p.m.