Underscoring my previous observation, not only did Bob Groom lose 27 games as a rookie with the '09 Senators, but he would end up losing 20 with three different teams (it would be unfair not to note that when the Senators began to rise from the basement, Groom would win 24 in 1912).
As an aside, his Baseball-Reference page has a brief but moving message on it. It's sponsored by his granddaughter:
Bob Groom Statistics and History | Baseball-Reference.com