Carl Yastrzemski, often referred to as "Yaz," was a professional baseball player who spent his entire Major League Baseball (MLB) career with the Boston Red Sox. He was primarily an outfielder and later transitioned to first base. Yastrzemski made his MLB debut on April 11, 1961, and quickly established himself as a key player for the Red Sox.

Throughout his career, Yastrzemski was known for his exceptional hitting ability, defensive skills, and durability. He was a left-handed batter and threw right-handed. Over his 23 seasons in the league, he compiled a career batting average of .285, with 3,419 hits, 452 home runs, and 1,844 runs batted in (RBIs). He was a consistent performer, earning 18 All-Star selections and winning the American League Most Valuable Player (MVP) award in 1967, a season in which he led the league in several offensive categories, including batting average, home runs, and RBIs.

Yastrzemski was also recognized for his defensive prowess, winning seven Gold Glove Awards as an outfielder. His ability to play both left field and first base allowed him to remain a valuable asset to the team throughout his career. He was known for his strong arm and reliable fielding skills.

In addition to his individual accolades, Yastrzemski played a significant role in the Red Sox's success during his tenure. He was a key player in the team's 1967 pennant-winning season, which culminated in a World Series appearance against the St. Louis Cardinals. Although the Red Sox lost the series, Yastrzemski's performance during the season solidified his status as one of the franchise's all-time greats.

Yastrzemski's career was marked by consistency and longevity. He was known for his work ethic and dedication to the game, which contributed to his ability to perform at a high level well into his 40s. He retired after the 1983 season, leaving behind a legacy as one of the greatest players in Red Sox history.

Following his retirement, Yastrzemski was inducted into the Baseball Hall of Fame in 1989, recognizing his contributions to the sport and his impressive career statistics.