Marcy McDonnell

Marcy Richard McDonnell (February 14, 1852 – April 3, 1916) was an American professional baseball pitcher who played in one major league game for the Baltimore Marylands in . Starting for Baltimore in their season opener on April 14, McDonnell gave up 18 hits and 24 runs in a 24–3 loss to Washington. In the field, he committed one error in five chances, and at the plate he had no hits in four at bats, but scored a run. McDonnell appeared in an old-timers game in 1895 and died in Macdonaldton, Pennsylvania on April 3, 1916.

McDonnell had no known first name and was identified incorrectly in baseball records as "McDoolan" until 2025, when the Society for American Baseball Research discovered his real name.