| Biographical details | |
|---|---|
| Born | May 23, 1888 |
| Died | June 1981 (aged 93) |
| Coaching career (HC unless noted) | |
| Football | |
| 1924–1928 | San Jose State |
| Baseball | |
| 1925–1928 | San Jose State |
| Soccer | |
| 1918 | Stanford |
| Head coaching record | |
| Overall | 14–22–2 (football) 27–14–1 (baseball) 0–2 (soccer) |
| Accomplishments and honors | |
| Championships | |
| Football 1 CCC (1928) | |
Ernesto R. Knollin (May 23, 1888 – June 1981) was an American football, baseball, and soccer coach.