Landing randomly on a page (778) from April, 2012, I happened on this question of identifying a mystifying baserunner from a sliding exercise in Yankees Spring Training, 1959. The first baseman is clearly Norm Siebern and the instructor could be Coach Ralph Houk.
And I'll be darned if the slider isn't Rod Kanehl, a non-roster invitee to the Yankee camp and three years later the famous utilityman "Hot Rod" of the infamous '62 Mets. I think this would be the only known photo of him in a Yankee uniform.
Below is a screen cap of the page, and here's the link to the original post:
http://www.ootpdevelopments.com/boar...ml#post3287934