Jack Killilay

{{Short description|American baseball player (1887–1968)}}

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

{{Infobox baseball biography

|name=Jack Killilay

|position=Pitcher

|image=

|bats=Right

|throws=Right

|birth_date={{birth date|1887|5|24}}

|birth_place=Leavenworth, Kansas

|death_date={{death date and age|1968|10|21|1887|5|24}}

|death_place=Tulsa, Oklahoma

|debutleague = MLB

|debutdate=May 13

|debutyear=1911

|debutteam=Boston Red Sox

|finalleague = MLB

|finaldate=September 22

|finalyear=1911

|finalteam=Boston Red Sox

|statleague = MLB

|stat1label=Win–loss record

|stat1value=4–2

|stat2label=Earned run average

|stat2value=3.54

|stat3label=Strikeouts

|stat3value=28

|teams=

• Boston Red Sox (1911)

}}

John William Killilay (May 24, 1887 – October 21, 1968) was a pitcher in Major League Baseball who played for the Boston Red Sox during the {{By|1911}} season. Listed at {{height|ft=5|in=11}}, 165 lb., Killilay batted and threw right-handed. He was born in Leavenworth, Kansas.

Killilay posted a 4-2 with 28 strikeouts and a 3.54 ERA in 14 appearances, including seven starts, one complete game, and 61 innings of work.

Killilay died in Tulsa, Oklahoma at age 81.