| Date | Transaction |
| 02-28-1974 | Tom Sinnott has retired from football. |
| 08-23-1965 | The Washington Xenomorphs have waived Tom Sinnott. |
| 08-16-1965 | The Washington Xenomorphs have moved Eddie Brown and Rocky Bryant to the active roster. The Washington Xenomorphs have moved Wilbur Kilroy and Tom Sinnott to the inactive roster. |
| 08-15-1965 | The Washington Xenomorphs have moved Andre Reynolds, Roy Smith, Tom Sinnott, Willie Spirida, Albert Ray, Cliff Welch, Elmer Isom, John Farley, Ravin Broadhurst, E.L. Ulinski, John Jefferson, Floyd Ryan, Sean Broyles, Don Leary, Dar Smith, Jason Simmons, James Bond, and Oscar Key to the active roster. The Washington Xenomorphs have moved Rick Larden, Joe Robustelli, Mike Hull, Mark Hickman, Doug Parker, Morris Joseph, Leather Al-Jabbar, Brandon Lund, Al Compton, Max Ariail, Jim Lofton, Jeff Zilly, Laron Stewart, Joey McDonald, Larry Herline, Kurt Johnson, Brian Eissler, and Tom Walter to the inactive roster. |
| 05-02-1965 | The Washington Xenomorphs have acquired Tom Sinnott from the waiver wire. |
| 09-07-1964 | The Green Bay Blizzard have moved Jim Greene to the active roster. The Green Bay Blizzard have moved Jerry Baldwin to the inactive roster. |
| 09-07-1964 | The Green Bay Blizzard have waived Tom Sinnott. |
| 09-07-1964 | Trade #43469 has been completed between the Washington Xenomorphs and the Green Bay Blizzard. The Green Bay Blizzard receive James Reynolds (DT), Ken Randle (G), Tom Sinnott (LB) from the Washington Xenomorphs in exchange for Draft Pick - 1967 Round 4 (GB). |
| 09-07-1964 | The Washington Xenomorphs have moved Oliver Zirinsky, Rick Larden, Larry Herline, Kurt Johnson, Louis Secord, Tom Walter, Brandon Lund, and Rat Howard to the active roster. The Washington Xenomorphs have moved Oscar Key, Elmer Isom, John Farley, Tony Frankian, Tom Sinnott, Joe Currivan, and Gordon Holman to the inactive roster. |
| 08-24-1964 | The Washington Xenomorphs have moved Larry Herline, Kurt Johnson, Brandon Lund, Joey McDonald, Rat Howard, Rick Larden, Joe Robustelli, Jeff Zilly, Oliver Zirinsky, Tom Sinnott, and Mike Hull to the active roster. The Washington Xenomorphs have moved Paul Dunaway, Robb McConnell, Hank Owens, Andre Reynolds, Mike Protz, Elmer Isom, Tony Frankian, Barry Holmes, Dave Studwell, Rick Mulleneaux, and Gene McEvoy to the inactive roster. |
| 08-16-1964 | The Washington Xenomorphs have moved Roy Smith, Gordon Holman, Willie Spirida, Calvin Studdard, Mike Corley, Hank Owens, Elmer Isom, Rashod Davidson, Mike Protz, Tony Frankian, Bill Govan, Gene McEvoy, Pete Burgess, Barry Holmes, Rick Mulleneaux, George Jawish, Tony Moriarty, Richard Studdard, Oscar Key, Paul Dunaway, and Kenny Layden to the active roster. The Washington Xenomorphs have moved Tom Walter, Kevin Dubzinski, Morris Joseph, Mike Hull, Tom Sinnott, Oliver Zirinsky, Jack Signaigo, Brandon Lund, Al Compton, Sammy Schmit, Max Ariail, Laron Stewart, Leo Scarpitto, Kurt Johnson, Joey McDonald, James Staysniak, Rick Larden, Joe Robustelli, Ken Randle, Jeff Wiska, and Larry Herline to the inactive roster. |
| 10-07-1963 | The Washington Xenomorphs have moved Tom Sinnott, Robb McConnell, and Pete Burgess to the active roster. The Washington Xenomorphs have moved Ryan Mills, Tony Frankian, and Gene McEvoy to the inactive roster. |
| 09-30-1963 | The Washington Xenomorphs have moved Gordon Holman, Ryan Mills, Joe Currivan, Tony Frankian, and Oscar Key to the active roster. The Washington Xenomorphs have moved Tom Sinnott, Brandon Lund, Robb McConnell, Pete Burgess, and Barry Holmes to the inactive roster. |
| 08-12-1963 | The Washington Xenomorphs have moved Tom Sinnott to the active roster. |
| 08-12-1963 | The Washington Xenomorphs have acquired Tom Sinnott from the waiver wire. |
| 08-05-1963 | The Providence Heretics have waived Tom Sinnott. |
Linebacker