| Name | Date of birth | Birthplace | Race |
| Radach, Chris | 10 Mar 1894 | Montenegro | Caucasian |
| Radcliffe, Irvin | 31 Aug 1884 | | White |
| Radovitch, Millo | 23 Feb 1891 | Montenegro | Caucasian |
| Radulnich, Pete | 20 Jun 1873 | | White |
| Rael, Frank | 2 Apr 1894 | Colorado | Caucasian |
| Rael, Frutoso Andrew | 21 Jan 1886 | | White |
| Rael, Julius | 7 Jan 1889 | Colorado | Caucasian |
| Ragenovich, Bozo | 7 Jan 1891 | Bosnia and Herzegovina Austria | Caucasian |
| Ragenovich, Eli | 4 Jul 1875 | | White |
| Ragenovich, Nick | 10 Apr 1889 | Bosnia and Herzegovina Austria | Caucasian |
| Ragenovich, Nick Mike | 15 Mar 1893 | Bosnia and Herzegovina Austria | Caucasian |
| Rahn, William Alfred | 17 Feb 1880 | | White |
| Ramirez, Braulio | 20 Mar 1876 | | White |
| Ramirez, Jose | 20 Nov 1893 | Colorado | Caucasian |
| Ramirez, Juan | 24 Jun 1892 | Mexico | Mexican |
| Ramirez, Pedro | 29 Jun 1886 | | White |
| Ramos, Justo | 19 Jul 1877 | | White |
| Rampa, Mike | 10 Aug 1896 | Colorado | |
| Rampa, Tobias | 31 Oct 1898 | | White |
| Randall, David Charles | 5 May 1877 | | White |
| Randolph, Arthur Davis | 18 Dec 1879 | | White |
| Rangus, Louie | 26 Jan 1891 | Austria | Caucasian |
| Ranjel, Antonio | 3 Jun 1893 | | White |
| Rapanakis, Kanake M | 25 Oct 1883 | | White |
| Ratnovitch, Eli | 1 Dec 1888 | Austria | Caucasian |
| Ravanelli, Mike | 3 Jan 1883 | | White |
| Read, Elmer | 6 Dec 1887 | Colorado | Caucasian |
| Read, Fred George | 18 Dec 1875 | | White |
| Read, George Frederick | 12 Jun 1884 | | White |
| Read, Grover Renick | 24 Jul 1886 | Colorado | Caucasian |
| Read, James Lewis | 23 Jan 1875 | | White |
| Read, Phillip Martin | 18 Nov 1882 | | White |
| Read, Ralph | 26-Mar-00 | | White |
| Reck, Norman | 14 Mar 1884 | | White |
| Reed, Richard Louis | 30 Aug 1879 | | Black |
| Reed, Warren Fred | 18 May 1893 | Missouri | Caucasian |
| Rees, Thomas John | 7 Jul 1887 | Colorado | American |
| Reese, August | 1 Oct 1885 | | White |
| Reese, Thomas | 7 Nov 1876 | | White |
| Regonovich, Steve | 25 Oct 1889 | Bosnia and Herzegovina Austria | Caucasian |
| Rejonivich, Mike | 8 Nov 1874 | | White |
| Remich, Joe | 5 Mar 1882 | | White |
| Remkus, Stanley | 15 Jun 1885 | | White |
| Reno, Peter | 1890 | Italy | Italian |
| Repatti, Dave | 2-May-00 | | White |
| Repola, Arthur | 13 Apr 1891 | Italy | Caucasian |
| Repola, Leopoldo | 21 Feb 1885 | | White |
| Repola, Vincenzo | 1 Sep 1888 | Italy | Caucasian |
| Reviglio, Felice Michaele | 25 Nov 1884 | | White |
| Rey, Fermia | 15 Sep 1896 | Spain | |
| Reyes, Benito | 21 Mar 1882 | | White |
| Reyes, Lasaro | 17 Dec 1890 | New Mexico | Caucasian |
| Reynolds, Admirel Dewey | 12 Dec 1898 | | White |
| Reynolds, David Llewellyn | 18 Sep 1872 | | White |
| Reynolds, James Madison | 9 Dec 1878 | | White |
| Reynolds, John | 16 Jun 1874 | | White |
| Reynolds, John Melvin | 13 Mar 1882 | | White |
| Reynolds, Lammar William | 23 Oct 1899 | | White |
| Reynolds, Marcelo | 10 Sep 1894 | Colorado | Caucasian |
| Rezun, Tony | 17 May 1880 | | White |
| Ribali, Brigido | 6 Oct 1880 | | White |
| Ribali, Jose | Jun 1892 | Colorado | Caucasian |
| Ribera, Adolfo | 18 Oct 1884 | | White |
| Richards, Adam | 4 Jul 1885 | | White |
| Richards, William H | 14 Dec 1888 | Colorado | Caucasian |
| Richter, Emil | 30 Jan 1889 | Germany | Caucasian |
| Rick, John | 28 Sep 1895 | Colorado | Caucasian |
| Ricketts, Herman | 29 Dec 1894 | Missouri | |
| Ricottoni, Toni | 23 Apr 1894 | Sicily Italy | Caucasian |
| Ridenour, Frank Orval | 7 Feb 1891 | Colorado | Caucasian |
| Ridings, William Edward | 22 Aug 1874 | | White |
| Riggio, Frank | 22 Mar 1897 | Colorado | |
| Riggio, Mitchel | 12 Jul 1885 | | White |
| Riggio, Sam | 28 Aug 1889 | | White |
| Riggo, Pete | 7 Dec 1884 | | White |
| Riley, Joseph | 26 Sep 1892 | Louisiana | Black |
| Riley, Robert Clark | 18 Sep 1896 | Colorado | |
| Riley, William Francis Jr. | 8 Jan 1894 | Missouri | Caucasian |
| Rilling, Claude | 22 Jul 1881 | | White |
| Rilling, Ernest Lotton | 21 Jul 1885 | | White |
| Rino, Giuseppe | 19 Mar 1886 | | White |
| Rino, Peter | | | |
| Rio, John | 1 Apr 1884 | | White |
| Riordan, Frank Monroe | 4 Mar 1876 | | White |
| Rios, Juan | 26 May 1898 | | White |
| Rios, Ramon Cosanta | 9 Aug 1883 | | White |
| Ritter, John Furmer | 27 Oct 1894 | Colorado | Caucasian |
| Ritter, Kimery Ernest | 31 Aug 1889 | Colorado | Caucasian |
| Ritz, John | 12 Aug 1893 | Colorado | Caucasian |
| Ritz, Mike | 1887 | Pennsylvania | Caucasian |
| Ritz, Steve | 6 Mar 1898 | | White |
| Ritz, Tom | 1890 | Pennsylvania | Caucasian |
| Ritzus, John | 20 Jul 1894 | Pennsylvania | Caucasian |
| Rivali, Eustaguio | 20 Sep 1897 | | White |
| Rivera, Aaron | 3 Dec 1898 | | White |
| Rivera, Abel | 24 Mar 1881 | | White |
| Rivera, Elias | 11 Mar 1884 | | White |
| Rivera, Eliseo | 27 May 1886 | | White |
| Rivera, Felix | 29 Jul 1897 | Colorado | |
| Rivera, Frank Antonio | 21 Jul 1885 | | White |
| Rivera, Julian | 25 Jun 1885 | | White |
| Rivera, Mateo | 21 Sep 1876 | | White |
| Rivera, Pedro Jose | 14 Apr 1881 | | White |
| Rivera, Theodora | 14 Dec 1890 | Colorado | Caucasian |
| Rivera, Tobias D | 9 Oct 1889 | Colorado | Caucasian |
| Roalta, Pio | 21 Aug 1880 | | White |
| Robart, Henry Elba | 8 Feb 1887 | Michigan | Caucasian |
| Roberts, Alonzo | 16 Oct 1880 | | White |
| Roberts, David Growne | 21 Feb 1888 | Great Britain South Wales | Caucasian |
| Roberts, Gerry | 5 Jun 1874 | | White |
| Roberts, Oscar Vannie | 2 Oct 1872 | | White |
| Roberts, Robert | 23 Sep 1884 | | White |
| Roberts, Sherman LeRoy | 5 Feb 1894 | Nebraska | Caucasian |
| Robinson, Joesph | 9 Mar 1896 | Missouri | White |
| Robinson, Joseph Franklin | 19 Mar 1882 | | White |
| Robinson, Otis | 5 Apr 1878 | | White |
| Roche, Allen | 10 Jan 1895 | Colorado | Caucasian |
| Roche, Glenn H | 12 Apr 1889 | Colorado | Caucasian |
| Roche, Jesse Alexander | 29 Jun 1882 | | White |
| Rodda, Benjamin George | 25 Aug 1880 | | White |
| Rodgers, Berney | 2 Aug 1882 | | White |
| Rodich, Lozo | 6 Apr 1884 | | White |
| Rodich, Mike | Jun 1895 | Bosnia and Herzegovina Serbia | Servian |
| Rodrigues, Donacino | 4 Jun 1878 | | White |
| Rodrigues, Feleverto | 12 Jul 1896 | Colorado | |
| Rodrigues, Jose | 5 Sep 1889 | Mexico | Caucasian |
| Rodrigues, Juan Esteban | 20 Mar 1899 | | White |
| Rodrigues, Lucas | 18 Jan 1892 | Mexico | Caucasian |
| Rodriguez, Alejandro | 17 Jul 1892 | New Mexico | Caucasian |
| Rodriguez, Aurelio Atrio | 28 Aug 1884 | | White |
| Rodriguez, Fidelio | 20 Sep 1877 | | White |
| Rodriguez, Joe | 19 Nov 1891 | California | Caucasian |
| Rodriguez, Pedro | Aug 1886 | Mexico | Caucasian |
| Rodriguez, Polito | 20 Nov 1891 | Mexico | Caucasian |
| Rodriguez, Tito | 28 Dec 1887 | Colorado | Caucasian |
| Rodriguez, Toribio Jesus | 10 May 1888 | New Mexico | Caucasian |
| Rodriguez, Trinidad | 26 May 1876 | | White |
| Rogers, Earl | 25 Aug 1894 | Colorado | Caucasian |
| Rogers, Richard | 12 Jan 1873 | | White |
| Rojas, Juan | 24 Jun 1888 | Mexico | Caucasian |
| Rollins, Walter Lee | 12 May 1878 | | White |
| Roma, Pasaquale | 26 Mar 1892 | Italy | Caucasian |
| Roma, Paul | 26 Jan 1889 | Italy | Caucasian |
| Romana, Louis | 17 Dec 1890 | Italy | Caucasian |
| Romano, Steve Baroltal | 31 Oct 1873 | | White |
| Romanos, Paulos | 10 Jan 1890 | Greece | Caucasian |
| Romelli, Angelo | 5 Jun 1879 | | White |
| Romero, Albino | 3 Feb 1893 | New Mexico | Caucasian |
| Romero, Benigno Galindre | 10 Mar 1876 | | White |
| Romero, Benj | 28 Jul 1899 | | White |
| Romero, Carlos Eloy | 23 Oct 1881 | | White |
| Romero, Claude | 23 Jan 1897 | Colorado | |
| Romero, Daniel | 10 Dec 1883 | | White |
| Romero, Felix | 16 May 1894 | New Mexico | Caucasian |
| Romero, Fred | 7 Sep 1888 | Colorado | Caucasian |
| Romero, Joe E | 6 May 1897 | Colorado | |
| Romero, Jose E | 1896 | Colorado | Caucasian |
| Romero, Jose Erineo | 15 Oct 1877 | | White |
| Romero, Juan I | 15 May 1886 | New Mexico | Caucasian |
| Romero, Juan M | 13 Sep 1888 | Colorado | Caucasian |
| Romero, Julian | 1894 | Colorado | Caucasian |
| Romero, Lee | 15 Mar 1885 | | White |
| Romero, Leo A. | 25 Sep 1891 | Starkville, Co. | White |
| Romero, Louis Antonio | 3 May 1894 | Colorado | Mexican |
| Romero, Maubricio | 23 May 1898 | | White |
| Romero, Meliton | 22 Oct 1880 | | White |
| Romero, Moises | 26 Aug 1898 | | White |
| Romero, Onecimo | 16 Apr 1876 | | White |
| Romero, Onofre | 10 Jan 1897 | Colorado | |
| Romero, Sebero | 12 Feb 1898 | | White |
| Romero, Sotelo | 17 Aug 1886 | Colorado | Caucasian |
| Romero, Thomas Q | 8 Nov 1895 | Colorado | Mexican |
| Romero, Vicenta | 15 Aug 1889 | Colorado | Caucasian |
| Romie, Eli | 25 Dec 1887 | Bosnia and Herzegovina Austria | Caucasian |
| Romo, Felipe | 13 Sep 1880 | | White |
| Romonivitch, John | 1881 | | White |
| Rook, Dick Lee | 11 Aug 1896 | Colorado | |
| Rosales, Loribio | 16 Apr 1880 | | White |
| Rosetti, Vasalio | 21 Jun 1895 | Italy | Caucasian |
| Rosic, John | 15 Aug 1878 | | White |
| Rosky, Joseph | 19 Mar 1874 | | White |
| Ross, Charles | 16 Aug 1877 | | White |
| Ross, Charles | 19 Nov 1877 | | White |
| Ross, Joseph | 18 Dec 1879 | | White |
| Rossetti, George | 6 Feb 1896 | Italy | Caucasian |
| Rossetti, Gregorio | 8 Mar 1891 | Italy | Caucasian |
| Rossi, Pete Ernesto | 9 Jun 1881 | | White |
| Rosso, Louis | 10 May 1877 | | White |
| Rotar, John | 24 Dec 1886 | Austria | Caucasian |
| Roudebush, Jacob J | 27 Oct 1876 | | White |
| Roukuteiki, Steve | 4 Dec 1881 | | White |
| Roush, Allen Joseph | 20 Jul 1891 | Kansas | Caucasian |
| Roush, John Alfred | 19 Jun 1884 | | White |
| Roussey, Chris M | 3 Aug 1887 | Turkey | Caucasian |
| Rowe, Otis | 19 Apr 1899 | | White |
| Roybal, Elias | 2 Dec 1889 | Walsenburg, Co. | |
| Roybal, Eloy | 10 Sep 1896 | Colorado | |
| Roybal, Juan Batista | 30 Mar 1882 | | White |
| Rozlosnik, Michael William | 23 Jul 1899 | | White |
| Ruano, Franisco | 4 Oct 1881 | | White |
| Rubalcalda, Benigno | 12 Feb 1895 | Mexico | Caucasian |
| Ruibal, Manuel DeAtocha | 25 Dec 1882 | | White |
| Ruiz, Albino | 1 Mar 1882 | | White |
| Ruiz, Geronimo | 30 Sep 1896 | | White |
| Ruiz, Ignacio | 1 Feb 1885 | | White |
| Ruiz, Pantabe | Mar 1885 | | White |
| Rukowsky, John | 3 Jul 1876 | | White |
| Rusa, Tony | 18 Mar 1876 | | White |
| Russell, Duncan Malcon | 6 Mar 1884 | | White |
| Russell, William Benton | 18 Sep 1879 | | White |
| Ruszkievicz, George | 7 Aug 1876 | | White |
| Rutledge, Walton Gates | 14 Jun 1892 | Illinois | Caucasian |
| Ruybal, Jose | 4 May 1888 | Colorado | Caucasian |
| Ruzika, Frank | 30 Sep 1889 | Bremen Germany | Caucasian |
| Ruzinksy, Emil Joe | 27 Oct 1885 | | White |
| Ruzinsky, Carl | 31 Mar 1876 | | White |
| Ryan, Edward Levingston | 25-Mar-00 | | White |
| Ryan, James | 21 Jan 1873 | | White |
| Ryan, William Gordon | 15 Sep 1893 | Utah | Caucasian |
| Rzos, James | 15 Jul 1885 | | White |