John Thompson Mercer
| Date of birth | 1879 |
| Place of birth | Belfast |
| Nationality | Irish |
| Position | Outside right |
Ireland International.
Club stats
| Season | Team | Competition | Apps | Subs | Goals | Y | R |
|---|---|---|---|---|---|---|---|
| 1897-98 | Ireland | British Home Championship | 3 | ||||
| 1897-98 | Irish League | Inter League | 1 | ||||
| 1898-99 | Ireland | British Home Championship | 1 | ||||
| 1898-99 | Irish League | Inter League | 1 | 2 |
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| 1899-00 | Leicester City | League Division Two | 9 | 2 |
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| 1901-02 | Ireland | British Home Championship | 2 | ||||
| 1901-02 | Irish League | Inter League | 2 | ||||
| 1902-03 | Ireland | British Home Championship | 2 | ||||
| 1902-03 | Ireland | Ibrox Disaster Fund | 1 | ||||
| 1902-03 | Irish League | Inter League | 1 | ||||
| 1903-04 | Derby County | FA Cup | 6 | ||||
| 1903-04 | Derby County | League Division One | 24 | 1 |
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| 1903-04 | Ireland | British Home Championship | 2 | ||||
| 1903-04 | Irish League | Inter League | 1 | ||||
| 1904-05 | Derby County | League Division One | 2 | ||||
| 1904-05 | Ireland | British Home Championship | 1 |
Please note: Career stats are based on performances in the Premier and Football Leagues and (in most cases all) internationals.
Club matches
| Date | Match | Result | Competition | Round | |
|---|---|---|---|---|---|
| 19 Feb 1898 | Wales v Ireland | W | 0-1 | British Home Championship | |
| 05 Mar 1898 | Ireland v England | L | 2-3 | British Home Championship | |
| 26 Mar 1898 | Ireland v Scotland | L | 0-3 | British Home Championship | |
| 18 Feb 1899 | England v Ireland | L | 13-2 | British Home Championship | |
| 22 Feb 1902 | Wales v Ireland | W | 0-3 | British Home Championship | |
| 22 Mar 1902 | Ireland v England | L | 0-1 | British Home Championship | |
| 09 Aug 1902 | Ireland v Scotland | L | 0-3 | Ibrox Disaster Fund | |
| 21 Mar 1903 | Scotland v Ireland | W | 0-2 | British Home Championship | |
| 28 Mar 1903 | Ireland v Wales | W | 2-0 | British Home Championship | |
| 12 Mar 1904 | Ireland v England | L | 1-3 | British Home Championship | |
| 21 Mar 1904 | Wales v Ireland | W | 0-1 | British Home Championship | |
| 18 Mar 1905 | Scotland v Ireland | L | 4-0 | British Home Championship | |
Please note: Match history is complete for the Premier and Football Leagues and (in most cases all) internationals.