Rosen was tough, an amateur
boxer, and had a reputation for standing up to anyone who dared insult his ancestry. While some reports have him commenting that, as a minor leaguer, he wished his name were something less obviously Jewish, he is later known to have remarked that he wished it were
more Jewish—something like Rosenstein.
[16][17] When
Ed Sullivan, himself a
Catholic with a Jewish wife, suggested that Rosen might be Catholic, pointing to his habit of drawing a "cross" in the dirt with his bat, Rosen said the mark was an "x" and insisted on a retraction from Sullivan.
[16][2]
Once a White Sox opponent called him a "Jew *******". Sox pitcher
Saul Rogovin, also Jewish, remembered an angry Rosen striding belligerently to the
dugout and challenging the "son of a #####" to a fight. The player backed down.
[18]
Rosen challenged another opposing player who had "slurred [his] religion" to fight him under the stands. And during a game, when
Red Sox bench player Matt Batts taunted Rosen with
anti-Semitic names, Rosen called time and left his position on the field to confront Batts.
[17]Hank Greenberg recalled that Rosen "want[ed] to go into the stands and murder" fans who hurled anti-Semitic insults at him.
A 2010 documentary,
Jews and Baseball: An American Love Story, highlighted Rosen, who in it is frank about how he dealt with anti-Semitism: "There's a time that you let it be known that enough is enough. . . . You flatten [them]."
[