Some baseball fans are getting big bucks online for MLB hats with rather provocative design flaws. Here's what happened.

The Convair B-58 “Hustler” first took to the skies in the mid-1950s and would serve the Air Force through the next decade.

An MLB source told Front Office Sports that the design flaws were "unintentional" and missed during the product review process. The hats were ultimately removed from the MLB's online marketplace ...