The Evansville Otters will host an open house at Bosse Field in celebration of the 100th anniversary. The open house will be from 10 a.m. to 6 p.m. and is free to the public. Visitors will be able to take a self-guided tour and see areas that are not normally open to the public including the locker rooms, lounge areas, garages, and other usually off-limits areas. There also will be inflatables for the children on the front lawn of Bosse Field. At 1 p.m., members of the Evansville Police and Fire departments will play a softball doubleheader.