On June 2, 1959, Orioles pitcher Hoyt Wilhelm, pictured in 1962, was chased from the mound by a cloud of gnats that encircled the mound at Chicago's Comiskey Park.

I couldn’t pitch through them,” Wilhelm said of the gnats, which caused a 16-minute delay as groundskeepers used smoke bombs, burning rags and, finally, fireworks to disperse the pesky horde.