Archibald Joseph McCarthy (born January 21, 1881) was a pitcher in Major League Baseball. His career was short, and he only played for six weeks for the Detroit Tigers in 1902 and did not return for the following season. He debuted on August 14, 1902, at the age of 21 and played through the end of the 1902 Detroit Tigers season until September 18. Nothing is known of Arch McCarthy's life before or after his professional career, and his date of death is unknown.