This is the infamous fireballing the right-hander the Orioles signed to a huge bonus, only to discover that they'd only seen him pitch from a mound that was less than 60 feet, 6 inches from the plate.
Bruce Swango Register Statistics & History | Baseball-Reference.com
He's near the end here with Vancouver in 1962, in the same team picture as Bert Cueto shown here:
http://www.ootpdevelopments.com/boar...ml#post4094559