| Date | Transaction |
| 02-28-2062 | Ralph O'Brien has retired from football. |
| 09-06-2060 | The Rochester Explorers have waived Ralph O'Brien. |
| 09-06-2060 | The Rochester Explorers have moved Rommie Anderson and Jack Frahm to the active roster. The Rochester Explorers have moved Mike "Sauce" Crouthamel and Ralph O'Brien to the inactive roster. |
| 09-05-2060 | Ralph O'Brien of the Rochester Explorers is injured with a knee contusion and is expected to be out for approximately 12 days. |
| 09-16-2058 | The Rochester Explorers have moved Ralph O'Brien to the active roster. The Rochester Explorers have moved Ben "Bootsy" Berns to the inactive roster. |
| 09-02-2058 | The Rochester Explorers have acquired Ralph O'Brien from the waiver wire. |
| 08-25-2058 | The Philadelphia Federalists have moved Bobby Sumner to the active roster. The Philadelphia Federalists have moved Bing Gabattaboom to the inactive roster. |
| 08-25-2058 | The Philadelphia Federalists have waived Ralph O'Brien. |
| 12-02-2057 | The Philadelphia Federalists have moved Abe Lovuolo, Bobby Sumner, Eddie Lee Aydelette, Wayne Bowen, John Pope, John Seau, and Brian Jaszewski to the active roster. The Philadelphia Federalists have moved Ubett Churbuti, Jack Squatt, Ralph O'Brien, Rico Suave', J.J. Burnine, and Leon Lewis to the inactive roster. |
| 09-02-2057 | The Philadelphia Federalists have moved Ralph O'Brien, Alonzo Vucinich, Sonny Current, Rich Haight, and John Davis to the active roster. The Philadelphia Federalists have moved Mark Baker, Eddie Lee Aydelette, Wayne Bowen, John Talbert, and Bruce Hebert to the inactive roster. |
| 08-06-2057 | The Philadelphia Federalists have moved Tim Konetsky, Bill Pacella, Paul Barrabee, Jason Thomas, Maurice Whitehead, and Hal Sumner to the active roster. The Philadelphia Federalists have moved Reggie Harris, Lew Thompson, Bill Irvin, Kermit Bullman, Ralph O'Brien, and Gary Powell to the inactive roster. |
| 01-01-2057 | The Philadelphia Federalists have placed Ralph O'Brien on the Injured Reserve list for the remainder of the season. |
| 12-24-2056 | Ralph O'Brien of the Philadelphia Federalists is injured with a complete ACL tear and is expected to be out for the rest of the season. |
| 08-27-2056 | The Philadelphia Federalists have moved Alonzo Vucinich, Ralph O'Brien, Sonny Current, and Rich Haight to the active roster. The Philadelphia Federalists have moved Eddie Lee Aydelette, Wayne Bowen, Lynn Lyght, and Gerry Simmons to the inactive roster. |
| 11-28-2055 | The Philadelphia Federalists have moved Mark Baker, Gerry Simmons, Eddie Lee Aydelette, and Tony McCartney to the active roster. The Philadelphia Federalists have moved Ralph O'Brien and Carlos Adams to the inactive roster. |
| 04-28-2052 | The Philadelphia Federalists have moved Scott Toner, Ralph O'Brien, Steve King, Clete Harrison, Brian Dowling, and Dern Kerfuffel to the active roster. The Philadelphia Federalists have moved Kevin Deal, O.J. Sherlag, Billy Cosner, Olden Creaky, David Lee Wrath, and Eric Maniaci to the inactive roster. |
| 04-28-2052 | The Philadelphia Federalists have acquired Ralph O'Brien from the waiver wire. |
| 09-04-2051 | The New Orleans REBELS have waived Ralph O'Brien. |
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