In 1921, Leon Allen "Goose" Goslin began his baseball career as a Washington Senator, a left-handed powerhouse whose stay in the nation's capital transformed the Senators from perennial also-rans into world champions.

By 1923, Goslin had become a well-respected figure in professional baseball, leading the American League in triples with 18. His career reached a new high in 1924, when he led the league with 129 RBIs and a batting average of .344. That incredible season helped the Senators win their first and only World Series title in D.C. During that Fall Classic, Goslin showed remarkable efficiency, batting .344 with three home runs and setting a then-record six consecutive hits over three games. His performance truly highlighted his special value when the pressure was at its peak.

Between 1924 and 1928, he consistently ranked in the top ten of MVP voting three times. In 1928, he created his masterpiece by winning the American League Batting Title with a career-high .379 average, narrowly surpassing Heinie Manush on the final day of the season. He demonstrated exceptional control of the strike zone during this peak, achieving five seasons with a batting average over .300 and serving as a key defensive player in left field. Despite his charming "Goose" nickname in the field, he was a true iron man of his era, amassing 201 hits in consecutive seasons (1925–1926).

In 1930, the organization traded him to the St. Louis Browns. He returned for a final season in 1933, helping the Senators win their third and last American League pennant in D.C., but his main career remains tied to his decade in Washington.  Goslin compiled 1,939 hits, 127 home runs, and a .323 batting average as a Senator, and he joined the Baseball Hall of Fame in 1968.