Step 1 : Introduction to the question "Who is the only unanimous inductee into the Baseball Hall of Fame?"
...In 2019, Mariano Rivera made history by becoming the first player ever elected unanimously to the National Baseball Hall of Fame, receiving 100% of the votes from the Baseball Writers’ Association of America. Widely regarded as the greatest closer in baseball history, Rivera spent his entire career with the New York Yankees and holds the all-time record for saves (652). His dominance in high-pressure postseason situations further cemented his legacy, making his unanimous induction a fitting milestone in Hall of Fame history.
