Who was the last Yankee before Don Mattingly to wear #23? And what number did Mattingly wear when he first got called up?

From 1982 to 1983 — Don Mattingly‘s first two seasons with the New York Yankees, he wore #46, while appearing in only 98 games. In 1983, he switched to #23, which had been worn the previous year by coach Don Zimmer. Mattingly went on to wear #23 for his next 12 seasons, all with the Yankees.