[3] In 1909, at the Amateur Athletic Union (AAU) metropolitan senior championships, held at Travers Island, Rosenberger took first place in 100 and 220 yard dash.

[4] The following week, Rosenberger was part of the Irish American Athletic Club's four-man relay team that broke the world's record for the one-mile relay with a time of 3 minutes 20 2/5 seconds.

[5] On April 9, 1911,[6] Rosenberger anchored the Irish American Athletic Club 4×440 yard relay team that broke the world record at Celtic Park, Queens, New York and set the first IAAF- recognized world record for 4×440 yard or 4×400 meter relay race, in time of 3 minutes and 18.2 seconds.

[7] Rosenberger participated in the 1912 Summer Olympics but was eliminated in a 400 m semifinal.

[1] Next year, he competed in Australia with the AAU team,[8] and in 1915, he became the coach for the Long Island Athletic Club.