O'Brien Field is a baseball field located in downtown Peoria, Illinois. It is the home of the Peoria Chiefs, the Class A affiliate of the Chicago Cubs; the Chiefs previously played at Meinen Field. The first game scheduled for the stadium was May 24, 2002, Chiefs vs. Kane County Cougars. O'Brien Auto Team is the ballpark's naming rights partner.
Official groudbreaking ceremonies for the $23 million multi-purpose stadium took place on August 16, 2001. The new stadium includes a Trans-Lux video screen in right field, a state-of-the-art sound system, 300 Internet stations and the latest in telecom equipment. The stadium is built to hold 6000 people. About $1 million had been invested in audiovisual equipment, versus $10,000 worth at the old Meinen Field.
The field's official website ObrienField.com calls the ballpark "Central Illinois' largest outdoor sports & entertainment facility."
Beneath the sand and peat mix are six inches (152 mm) of gravel. Running through the gravel are drainage tiles that run from home plate to center field. A huge sump pump beyond center field then drains into the city sewer system.
The makeup of the pitcher's mound and batter's boxes are almost 100% clay because it packs better and holds moisture well. The rest of the infield skin area is around 80% clay and 20% sand.
The field will hold up to five inches (127 mm) of rain an hour, another advantage of O’Brien Field. The only way a game could be rained out would be due to a torrential downpour during a game.
The field is mowed every day during homestands, trimmed to 1-1¼ inches high. It takes less than an hour to cut the outfield grass with a cut mower. A walk-behind mower is used for the infield.
The price tag for the field itself was around $450,000.
Aside from the usual fare of hot dogs, cheeseburgers, nachos, and pizza, specialty foods such as Vienna Beef Chicago-style hot dogs, Dippin' Dots and Wisconsin cheeses are also available.