Joe Ostrowski (d. 2003) was a pitcher who played for the Yankees from 1950 to 1952. He collected three World Series Championships during his tenure with the Yankees. HIs signature is very hard to find and is on all Yankee collectors' want lists.
This baseball signed by Ostrowski is also inscribed with "NY Yankees, World Champs 1950-52". Accompanied by a PSA/DNA Certificate of Authenticity.