Carl Yastrzemski, more commonly known as 'Yaz', was an American professional baseball player who spent his entire 23-year career with the Boston Red Sox. He was an 18-time All-Star and is widely regarded as one of the greatest players in Major League Baseball (MLB) history.

Yastrzemski was born in Southampton, New York in 1939. He was drafted by the Red Sox in 1961 and made his major league debut the same year. He quickly established himself as one of the best hitters in baseball, leading the American League in batting average, runs scored, and hits in 1965. He also won the Triple Crown that year, becoming the first Red Sox player to do so since Ted Williams in 1947.

Yastrzemski was also an excellent fielder, winning seven Gold Glove Awards during his career. He was a key member of the Red Sox teams that won the 1967 World Series and the 1975 American League pennant. He was inducted into the Baseball Hall of Fame in 1989.

Yastrzemski was known for his consistency and durability, playing in 3,308 games over the course of his career. He retired in 1983 with 3,419 hits, 452 home runs, and 1,844 RBIs. He also holds the record for most games played in a Red Sox uniform with 3,308.

Yastrzemski was a beloved figure in Boston, where he was known for his loyalty to the Red Sox and his hard work ethic. He was a fan favorite and an inspiration to generations of Red Sox fans. He will always be remembered as one of the greatest players in baseball history.