That specific tagging indicates game-use from 2002 - 2004. See the link below...
http://ballcapblog.blogspot.com/2010...-cap-tags.html
No rostered players wore # 61 during 2002 or 2003. So if it's from one of those years, it could be a Spring Training example or a Coach's Cap.
In 2004, two players wore # 61 for the Yankees.... Brad Halsey and Juan Padilla. So most likely, it belonged to one of those two players.
Hope this helps,
Mark