Jack Sieg

{{Short description|American swimmer (1914–1968)}}

{{Use mdy dates|date=October 2024}}

{{Infobox swimmer

| name =

| image =

| image_size =

| alt =

| caption =

| birth_name =

| full_name =

| nickname =

| nationality =

| national_team =

| birth_date = {{Birth date|1914|12|10}}

| birth_place = Kansas City, Missouri, United States

| death_date = {{Death date and age|1968|12|21|1914|12|10}}

| death_place = Oklahoma, United States

| height =

| weight =

| spouse =

| website =

| strokes =

| classification =

| club = University of Iowa

| collegeteam =

| coach =

| medaltemplates =

}}

Jack George Sieg (December 10, 1914 – December 21, 1968) was an American swimmer who used the butterfly stroke in 1935,Matthew Syed: [http://www.timesonline.co.uk/tol/sport/olympics/article4526551.ece Matthew Syed: Claim that Michael Phelps will be the greatest is diminished by IOC excesses]{{dead link|date=September 2024|bot=medic}}{{cbignore|bot=medic}}, August 14, 2008 (The Times (London)). developed by his coach Dave Armbruster.[http://dailyiowan.lib.uiowa.edu/DI/1934/di1934-03-08.pdf Armbruster Enters 14 Men in Big Ten Tank Meet (p. 6/10)], March 8, 1934. [http://dailyiowan.lib.uiowa.edu/DI/1936/di1936-03-21.pdf All Iowa Behind Them (p. 4/8); Eight Old Swimmers Embark Tomorrow for National Tank Meet (p. 6/8); Allen Likes Fielhouse Pool; Brings Bob Christians With Him to Enroll (p. 7/8)], March 21, 1936. [http://dailyiowan.lib.uiowa.edu/DI/1937/di1937-10-13.pdf Iowa Mermen in Triangular Meet (p. 7/8)], October 13, 1937 (The Daily Iowan). He competed for the University of Iowa[http://h2g2.com/approved_entry/A14138147 How to Swim the Butterfly], Nov 14, 2006 (h2g2). and first used the stroke in a breaststroke leg of a medley relay February 25, 1935.[https://news.google.com/newspapers?id=6ahQAAAAIBAJ&sjid=5yEEAAAAIBAJ&pg=4768,5383253&dq=jack+sieg&hl=en Badgers beaten in Swim Meet], February 26, 1935: “for the first time in competition Monday” (The Milwaukee Journal).