Jack Hollenback
| Biographical details | |
|---|---|
| Born | August 10, 1884 Clearfield County, Pennsylvania, U.S. |
| Died | 1959 (aged 74–75) |
| Playing career | |
| 1904 | Penn |
| Coaching career (HC unless noted) | |
| 1908–1909 | Franklin & Marshall |
| 1910 | Penn State |
| 1911 | Pennsylvania Military |
| Head coaching record | |
| Overall | 21–11–3 |
John Coffey Hollenback (August 10, 1884 – 1959) was an American football player and coach. He served as the head football coach at Franklin & Marshall College from 1908 to 1909, Pennsylvania State University in 1910, and Pennsylvania Military College, now Widener University in 1911, compiling a career college football record of 21–11–3.
Hollenback was the older brother of Bill Hollenback, who was also a head football coach at Penn State. On December 28, 1910, he married Lulu Rowland, the daughter of Charles Hedding Rowland.