| Dan Lally | |
| Position: | Outfielder |
| Bats: | Left |
| Throws: | Right |
| Birth Date: | 12 August 1867 |
| Birth Place: | Jersey City, New Jersey |
| Death Place: | Milwaukee, Wisconsin |
| Debutleague: | MLB |
| Debutdate: | August 19 |
| Debutyear: | 1891 |
| Debutteam: | Pittsburgh Pirates |
| Finalleague: | MLB |
| Finaldate: | September 19 |
| Finalyear: | 1897 |
| Finalteam: | St. Louis Browns |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .267 |
| Stat2label: | Home runs |
| Stat2value: | 3 |
| Stat3label: | Runs batted in |
| Stat3value: | 58 |
| Teams: |
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Daniel J. Lally (August 12, 1867 – April 14, 1936), was a Major League Baseball outfielder. He played for the 1891 Pittsburgh Pirates and 1897 St. Louis Browns of the National League. In addition to his two brief appearances in the Majors, he had an extensive minor league baseball career that lasted from 1887 through 1905.
After his playing career ended, he was an umpire in the South Atlantic League in 1907 and was later committed to the Wisconsin State Asylum after being declared insane in 1910.[1]