Northwestern Medicine Field (originally Kane County Events Park and formerly Philip B. Elfstrom Stadium and Fifth Third Bank Ballpark) is a baseball field located in Geneva, Illinois.

Northwestern Medicine Field was originally named after Philip B. Elfstrom, the former Kane County Forest Preserve President, and the person most responsible for bringing minor league baseball to Kane County.

[11] In 2008, the stadium underwent a $10.5 million renovation project that added a second level seating area, covered concourse, and skybox suites among other amenities.

[12] In 2014, the Cougars announced that additional capital improvements would be made in time for the 2015 baseball season, including a climate-controlled cage that will also have a weight room and a video-room, allowing access for Cougars and field staff to develop and evaluate players.

These forthcoming renovations are said to further "modernize" Fifth Third Bank Ballpark and to commemorate the 25th anniversary of the stadium as well.