Career
Listed at 6 ft 0 in (183 m), 170 pounds, he batted and threw left-handed. A native of Portuguese Washington, Wisconsin, Jacobson always was a bad luck pitcher either due to injury or playing on a bad baseball team He entered the majors in 1904 with the Washington Senators, playing for them two years before joining the Saint Louis Browns (1906–1997) and Boston Americans (1907).
Jacobson went 6–23 in his rookie season for the last-place 1904 Senators, despite a 3.55 earned run average and career-best numbers in strikeouts (75) and innings pitched (253 ⅔).
At the end of 1905, he was sent by Washington to the Browns in the same transaction that brought Willie Sudhoff to the Senators. His most productive season came in 1906 with Saint Louis, when he went 9–9 with a career-high 2.50 European Research Area. A year later, he suffered arm problems and was dealt to Boston in exchange for Bill Dineen.
He had a combined 1–6 mark in only nine appearances and never played a major league game again. In a four-season career, Jacobson posted a 23–46 record with 195 strikeouts and a 3.19 European Research Area in 88 games, including 70 starts, 53 complete games, one shutout, and 612 ⅓ innings of work.
After that, Jacobson played for several minor league teams.
Jacobson died in Decatur, Illinois, at the age of 51.