In 1929, Goslin's batting average dropped to .288.
Two months into the 1930 season, with Goslin struggling with a .271 batting average, the Senators traded him to the St. Louis Browns for Heinie Manush and Alvin Crowder.
Goslin batted .326 with a career-high .652 slugging percentage for the Browns in 1930.
In 101 games for the Browns, Goslin had 30 home runs, 100 RBI, and 62 extra base hits.
Goslin had another solid year for the Browns in 1931, batting .328 with a career-high 42 doubles, 76 extra base hits and 105 RBI.

While Goslin's average slipped to .299 in 1932, he still drove in 104 runs for the Browns.
On Opening Day, April 12, Goslin came up to the plate against the Chicago White Sox with a bat that featured 12 longitudinal green stripes.
The bat was thrown out of the game, and on the following day, American League President William Harridge declared the "zebra bat" illegal, as it caused a distraction to the fielding team.
At the end of the 1932 season, Goslin was traded back to the Senators.
Goslin led the team back to the World Series in 1933.
The Senators played in only three World Series in their history, and Goslin played for the Senators in every game of those Series.
However, Goslin did not have his usual power in 1933.
His 64 RBI and .452 slugging percentage were Goslin's lowest numbers since his rookie season.
In 1929, Goslin's batting average dropped to .288. Two months into the 1930 season, with Goslin struggling with a .271 batting average, the Senators traded him to the St. Louis Browns for Heinie Manush and Alvin Crowder. Goslin batted .326 with a career-high .652 slugging percentage for the Browns in 1930. In 101 games for the Browns, Goslin had 30 home runs, 100 RBI, and 62 extra base hits. Goslin had another solid year for the Browns in 1931, batting .328 with a career-high 42 doubles, 76 extra base hits and 105 RBI.
While Goslin's average slipped to .299 in 1932, he still drove in 104 runs for the Browns. On Opening Day, April 12, Goslin came up to the plate against the Chicago White Sox with a bat that featured 12 longitudinal green stripes. The bat was thrown out of the game, and on the following day, American League President William Harridge declared the "zebra bat" illegal, as it caused a distraction to the fielding team. At the end of the 1932 season, Goslin was traded back to the Senators. Goslin led the team back to the World Series in 1933. The Senators played in only three World Series in their history, and Goslin played for the Senators in every game of those Series. However, Goslin did not have his usual power in 1933. His 64 RBI and .452 slugging percentage were Goslin's lowest numbers since his rookie season.
Goose Goslin