Mickey Vernon would accumulate 1,993 of his 2,495 Hits with the Washington Senators and smacked enough so that he could win two Batting Titles (1946 & 1953).  Vernon was chosen to play in five All-Star Games and in 1953 he finished third in MVP voting.  He also had two more top ten finishes in MVP voting while playing for Washington.  Had Vernon even been average defensively (he never had one season where he had a positive Defensive bWAR as a Senator) his ranking would be significantly higher.

Joe Cronin is far more known for being a member of the Boston Red Sox.  The BoSox retired his number and he represented the American League in the All-Star Game five times.  Still, Cronin’s overall production with the Washington Senators isn’t that far off from what he accomplished in Massachusetts. 

Save for a couple of productive seasons with the Boston Red Sox early in his career, Buddy Myer was a career member of the Washington Senators, the team he began and ended his career with.  Myer had six seasons where he batted over .300, one of which saw him bat .349, enough to win him the American League Batting Title in 1935.  He was named an All Star that year and again in 1937.  Myer, who batted .303 as a Senator with 1,828 Hits, was probably known best for a brawl with Ben Chapman (the racist Yankee who would become an even more racist manager with the Phillies who taunted Jackie Robinson) after he taunted Myer for his Jewish heritage.

Considered one of the best defensive Pitchers of all time, Jim Kaat spent two-thirds of his astounding twenty-five seasons in MLB with the Senators/Twins.  Katt would go 190 and 159 as a Senator/Twin with 1,851 Strikeouts and had an impressive 25 and 13 1966 season, a campaign where he also led the AL in BB/9 and SO/BB. 

Kaat was considered to be one of the larger snubs in the Baseball Hall of Fame but the Veteran's Committee finally chose him for Cooperstown in 2022.  The Twins had already elected Kaat to their Hall as part of their second class in 2001.