Jorge Posada made his MLB debut on September 4, 1995 for the Yankees in a game against the Seattle Mariners at Yankee Stadium. He was a defensive replacement for Jim Leyritz in the 9th inning of the Yankees 13-3 victory.
Boston Red Sox
Nolan Ryan made his Major League debut with the New York Mets on September 11, 1966.
Babe Ruth made his major league debut on July 11, 1914.
Jackie Robinson's MLB debut for the Brooklyn Dodgers came on April 15, 1947.
Jackie Robinson was the first black ballplayer in Major League Baseball, made his Major League debut with the Brooklyn Dodgers on April 15, 1947.
Yogi Berra made his Major League Debut with the New York Yankees on September 22, 1946.
His uniform number (42) was retired by Major League Baseball.
Derek Jeter made his Major League debut with the New York Yankees on May 29, 1995.
Alex Rodriguez's first MLB team was the Seattle Mariners. He made his major league debut on July 8, 1994.
Ron Jones made his major league debut in late August 1988.
Babe Ruth made his Major League debut with the Boston Red Sox on July 11, 1914.
Ferguson Jenkins made his Major League debut on September 10, 1965 for the Philadelphia Phillies.