In our Connecticut community garden appeared this winter squash on a long vine which produced 4 or 5 nice oval winter squash. After baking, it scoops out somewhat stringy which suggests a relative of spaghetti squash. We saved the seed and wonder if it is a sport, a hybrid, an heirloom. Attached is a photo.
Squash cross readily within species. Good chance that it is a crossbreed. Sphaghetti squash cross with zucchini, acorns or any other C. pepo. Check with whoever planted it to see if they were store bought or saved seeds. Saved seeds almost always result in mystery squash, unless the seedsaver has taken the precautions necessary.