| Bill Hollenback | |
| Birth Date: | 22 February 1886 |
| Birth Place: | Blue Bell, Pennsylvania, U.S. |
| Death Place: | Bryn Mawr, Pennsylvania, U.S. |
| Player Years1: | 1904–1908 |
| Player Team1: | Penn |
| Player Years2: | 1921 |
| Player Team2: | Union Quakers of Philadelphia |
| Player Positions: | Fullback, end |
| Coach Years1: | 1909 |
| Coach Team1: | Penn State |
| Coach Years2: | 1910 |
| Coach Team2: | Missouri |
| Coach Years3: | 1911–1914 |
| Coach Team3: | Penn State |
| Coach Years4: | 1912, 1915 |
| Coach Team4: | Pennsylvania Military |
| Coach Years5: | 1916 |
| Coach Team5: | Syracuse |
| Coach Years6: | 1919 |
| Coach Team6: | Penn (assistant) |
| Overall Record: | 46–19–8 |
| Championships: | |
| Awards: |
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| Cfbhof Year: | 1951 |
| Cfbhof Id: | 1246 |
William Marshall "Big Bill" Hollenback (February 22, 1886 – March 12, 1968) was an American football player and coach. He played football at the University of Pennsylvania, where he was selected as an All-American fullback three straight years, from 1906 to 1908. Hollenback served as the head football coach at Pennsylvania State University (1909, 1911–1914), the University of Missouri (1910), Pennsylvania Military College, now Widener University (1912, 1915), and Syracuse University (1916), compiling a career college football record of 46–19–8. He was inducted into the College Football Hall of Fame as a player in 1951.
Born in Blue Bell, Pennsylvania, Hollenback attended Phillipsburg High School. As an undergraduate at the University of Pennsylvania from 1904 to 1908, he became one of the school's most renowned football players. He played end in 1904. He was unable to play during the 1905 season due to a broken leg. After returning from the injury, Hollenback was moved to the fullback, a position he played from 1906 to 1908. He was selected as an All-American fullback in each of those years. As a senior in 1908, Holleback was the captain of the undefeated Penn team that was named national champion. Jim Thorpe, whose Carlisle Indians team played Penn to a 6–6 tie in 1908, called Hollenback his "greatest and toughest opponent." In 1921, Hollenback played professional football for the Union Quakers of Philadelphia alongside future Philadelphia Eagles founder, co-owner and coach, Bert Bell. In 1925, Hollenback served as the referee for the Pottsville Maroons' 9–7 victory over the Notre Dame All-Stars, featuring the legendary Four Horsemen, at Shibe Park. The game resulted in a controversy that stripped the Maroons of their 1925 NFL championship
Hollenback received a degree in dentistry, but opted to become a football coach after graduating from Penn. He served as the head football coach at Penn State (1909, 1911–1914), the University of Missouri (1910), Pennsylvania Military College (1915) and Syracuse University (1916). During his tenure, he compiled a 28–9–4 (.732) record.
Hollenback served briefly as the president of the Bird Coal Company in 1914. He also owned the William M. Hollenback Coal Company. He was also active in politics, and served on the Philadelphia City Council from 1940 to 1944.
Hollenback married Marion Cressman in 1917. They had one child, William M. Hollenback, Jr. His older brother, Jack Hollenback, was also a head football coach at Penn State. Hollenback died on March 12, 1968, at Bryn Mawr Convalescent Center in Bryn Mawr, Pennsylvania.[1]