Jack Theis

{{Short description|American baseball player (1891–1941)}}

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

{{Infobox baseball biography

|name=Jack Theis

|image=Jack Theis.JPG

|position=Pitcher

|bats=Right

|throws=Right

|birth_date={{birth date|1891|7|23}}

|birth_place=Georgetown, Ohio

|death_date={{death date and age|1941|7|6|1891|7|23}}

|death_place=Georgetown, Ohio

|debutleague = MLB

|debutdate=July 5

|debutyear=1920

|debutteam=Cincinnati Reds

|finalleague = MLB

|finaldate=July 5

|finalyear=1920

|finalteam=Cincinnati Reds

|statleague = MLB

|stat1label=Games played

|stat1value=1

|stat2label=Innings pitched

|stat2value=2

|stat3label=Earned runs

|stat3value=0

|teams=

• Cincinnati Reds ({{baseball year|1920}})

}}

John Louis Theis (July 23, 1891 – July 6, 1941) was a pitcher in Major League Baseball. He played for the Cincinnati Reds. Theis holds the record shared by many for the lowest ERA in MLB history, having not allowed an earned run in the only game of his career.[https://www.baseball-reference.com/players/t/theisja01.shtml "Jack Theis Statistics and History"]. baseball-reference.com. Retrieved October 27, 2011.

He died from a heart attack in 1941 shortly before his 50th birthday.