The 1884 Baltimore club was one of the strongest ones in the Union Association, in that it lasted over 100 games and had a record over .500. Over two-thirds of their wins came from Bill Sweeney while Emmett Seery and Yank Robinson guided their offense.
A different team with the same name also played 13 games that year in the Eastern League, going 3-10 in two weeks of play before folding due to an inability to draw enough fans as the third team in town behind the AA's Orioles and the UA Monumentals.
The team was managed by Bill Henderson. Their top-hitting regular was left fielder Emmett Seery, who batted .311 with a slugging percentage of .408, and their ace pitcher was Bill Sweeney, who was 40-21 with an earned run average of 2.59, and pitched 538 of the team's 946 innings. The Monumentals were disbanded after the Union Association folded at the end of the 1884 season.
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