On May 4, 1984 — Dave Kingman’s 180 foot pop-up enters a drainage valve located in the Metrodome roof, and much to the surprise of the Twins infielders waiting to make the catch, the ball doesn’t drop back into play. The A’s slugger is credited with a ground-rule double, but the ball will stay put in the lining of the dome until tomorrow.

Sources:
National Pastime

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