The Swansea Independent Baseball League (SIBL for short) is one of two youth baseball leagues in the town of Swansea, other than the Swansea Little League. The league was established to offer an alternative to the town’s existing youth baseball program. The league’s first organizational meeting was held in September 1975, but later it was decided to delay its initial season until 1977 and has been an affiliate of PONY league baseball since 1978 (Taken from the official website linked above).
Another interesting part of SIBL is the location that the fields are situated at. The league purchased an old Nike Missle Site and constructed fields at the location during the mid-seventies. Ever since then the league has called this old site home. For more info on the original NIKE site that housed Ajax missiles, you can visit this page: http://coldwar-ma.com/PR-29_Swansea.html
You're looking for a small pill bottle located outside the gate for the fields. This type of container has been marked as both a small and micro before...if you think it should be marked as a micro instead of a small let us know and we may change it if enough people say so. This was hidden outside the gate (on town-owned land) because the gate is shut and locked during the cooler months, which would have made this cache inaccessible. As mentioned earlier you will need to BYOP as there is not one inside the cache.