Well, I'm posting to revive this old thread. I was at the Bonnie Brae Scottish Festival and Highland Games (in Basking Ridge, N.J., U.S.A.), and there it was again. Many, many Scottish/Irish-American Pipers, Drummers and celebrants wearing a baseball cap with their kilts on.

One of the most Scottish-American things I saw was a pair of pipe band members in the band area, waiting to compete, wearing kilts and band vests with ties and baseball caps with baseball mitts having a catch with an actual baseball.

Only in America?