| Date | Transaction |
| 02-28-2010 | John Masterson has retired from football. |
| 09-14-2009 | The Washington Dead Presidents have waived John Masterson. |
| 08-30-2009 | The Washington Dead Presidents have removed John Masterson from the trade block. |
| 08-24-2009 | The Washington Dead Presidents have placed John Masterson on the trade block. |
| 08-24-2009 | The Washington Dead Presidents have moved Richard Davis, Dean Murphy, Paul Duckens, Carl Griffith, Rich Hodson, and Dennis Riordan to the active roster. The Washington Dead Presidents have moved Dean Wilson, Tony Nesser, Mustafa Zuberi, Cleo Wycoff, John Blahak, John Masterson, and Frankford Ghost to the inactive roster. |
| 02-01-2009 | The Washington Capitolists have removed John Masterson from the trade block. |
| 12-14-2008 | The Washington Capitolists have moved John Masterson to the active roster. The Washington Capitolists have moved Tony Nesser to the inactive roster. |
| 09-29-2008 | The Washington Capitolists have placed John Masterson on the trade block. |
| 09-29-2008 | The Washington Capitolists have moved John Allen to the active roster. The Washington Capitolists have moved John Masterson to the inactive roster. |
| 09-28-2008 | The Washington Capitolists have removed John Masterson from the trade block. |
| 01-20-2008 | The Washington Capitolists have placed John Masterson on the trade block. |
| 02-04-2002 | The Washington Capitolists have moved Alex Knack and John Masterson to the active roster. The Washington Capitolists have moved Floyd Houghton and Mo McFeely to the inactive roster. |
| 02-03-2002 | The Washington Capitolists have moved Louis Fletcher and Floyd Houghton to the active roster. The Washington Capitolists have moved John Masterson and Alex Knack to the inactive roster. |
| 01-20-2002 | Trade #59320 has been completed between the Washington Capitolists and the Edmonton Fire Ants. The Edmonton Fire Ants receive Benjamin Thompson (T), Fred Smith (WR), Draft Pick - 2004 Round 4 (WAS) from the Washington Capitolists in exchange for John Masterson (G). |
| 12-24-2001 | The Edmonton Fire Ants have moved John Masterson to the active roster. The Edmonton Fire Ants have moved Charlie Jones to the inactive roster. |
| 09-10-2001 | The Edmonton Fire Ants have moved John Williams and Earl Franklin to the active roster. The Edmonton Fire Ants have moved Mike Bradshaw, Craig Doell, and John Masterson to the inactive roster. |
| 11-29-1999 | The Saskatchewan Chimeras have moved Sir Francis "The Queen's Pirate" Drake and John Masterson to the active roster. The Saskatchewan Chimeras have moved Charlie Jones, Bob Plasman, and Hamp Miller to the inactive roster. |
| 11-21-1999 | The Saskatchewan Chimeras have moved Bob Plasman to the active roster. The Saskatchewan Chimeras have moved John Masterson to the inactive roster. |
| 11-15-1999 | The Saskatchewan Chimeras have moved Ryan Hatley, Vince Kunz, and John Masterson to the active roster. The Saskatchewan Chimeras have moved Charles Dearth, Curley Hester, and Carlos Cadigan to the inactive roster. |
| 09-13-1999 | The Saskatchewan Chimeras have acquired John Masterson from the waiver wire. |
| 09-06-1999 | The Detroit Detritus have waived John Masterson. |
| 08-23-1999 | The Detroit Detritus have placed John Masterson on the trade block. |
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