| Major League Soccer 2012 Playoffs - Appearances as Referee |  |
 |
 |
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| 09/11/2012 | New York RB | - | D.C. United | 0:1 | 1 | 1 | 1 |
| 19/11/2012 | Seattle Sounders | - | Los Angeles Galaxy | 2:1 | 1 | 1 | - |
| Major League Soccer 2012 Playoffs - Appearances as Referee | |
|
|
||||
| 09/11/2012 | New York RB | - | D.C. United | 0:1 | 1 | 1 | 1 |
| 19/11/2012 | Seattle Sounders | - | Los Angeles Galaxy | 2:1 | 1 | 1 | - |
| Complete name: | Mark Geiger |
| Born: | 25/08/1974 |
| Place of birth: |
USA |
| Nationality: |
USA |