| Location | Source | Date | Page | Caption | Uniform | Type |
|---|---|---|---|---|---|---|
| Brace Photo | Boston AL | |||||
| CLASSIC BASEBALL CARDS, Frank Slocum (1912 T207) | 1987 | 207-7 | O'Brien, Boston Amer. | Boston AL | Pose | |
| THE AMERICAN LEAGUE: An Illustrated History, Donald Honig | 1983 | 71 | Thomas ("Buck") O'Brien joined the .... | Boston AL | Full length pose | |
| Library of Congress | http://hdl.loc.gov/loc.pnp/ggbain.11861 | 1912 | Thomas 'Buck' O'Brien | Boston AL (wearing coat) | Upper body pose | |
| RED SOX THREADS, Bill Nowlin | 2008 | 395 | The Red Sox Quartet | Boston AL (capless) | Group of 4 (head & shoulders) |