| Date | Transaction |
| 02-28-1996 | John Parker has retired from football. |
| 08-22-1994 | The Montreal Reapers have waived John Parker. |
| 09-07-1992 | The Las Vegas Sinners have moved Jarmar Kissell, J.W. Gerak, John Cameron, Tom Palmer, Kevin Nagel, Milt Sullivan, John Parker, Troy Snead, and Kez O'Delli to the active roster. The Las Vegas Sinners have moved Frank Condit, Lamar Subis, Nathan Krause, Jack Douglas, Scott Raye, Tara Chambler, and Harris McCafferty to the inactive roster. |
| 08-10-1992 | The Las Vegas Sinners have moved Bjorn Taylor, Mike Newberry, Dicky Alexander, Chris Brown, Fred Fulcher, Paul Gradishar, Bob Ramsey, Darrell Canale, Fred Migliazzo, Windlan Ruud, Tony Bidwell, Elmer Orosz, Jim Tuiasosopo, Rudi Bromell, Willie Ippolito, and Kirk Norman to the active roster. The Las Vegas Sinners have moved Kez O'Delli, Bill Ziegler, Dick Boselli, Brian Edwards, J.W. Gerak, Kevin Nagel, John Cameron, Jarmar Kissell, Troy Snead, Milt Sullivan, Amp Baker, John Parker, Tom Palmer, Harris McCafferty, Henry Villanucci, and Sedric McClure to the inactive roster. |
| 12-23-1991 | The Las Vegas Sinners have moved Jack Douglas and John Parker to the active roster. The Las Vegas Sinners have moved Elmer Orosz and Abe Wilson to the inactive roster. |
| 11-25-1991 | The Las Vegas Sinners have moved Nathan Krause and Scott Raye to the active roster. The Las Vegas Sinners have moved John Parker and Harris McCafferty to the inactive roster. |
| 11-24-1991 | John Parker of the Las Vegas Sinners is injured with a partial MCL tear and is expected to be out for approximately 34 days. |
| 09-22-1991 | John Parker of the Las Vegas Sinners is injured with a hip contusion and is expected to be out for approximately 6 days. |
| 09-01-1991 | The Las Vegas Sinners have moved Earl Finzer, Kevin Nagel, Troy Snead, and John Parker to the active roster. The Las Vegas Sinners have moved Scott Raye, Russ Kaiser, and Elmer Orosz to the inactive roster. |
| 08-05-1991 | The Las Vegas Sinners have moved Elbert Jeffires, Erron Schmitt, Windlan Ruud, Tom Morrison, Bobby Riordan, Jack Myers, George Lathon, Bjorn Taylor, Elmer Orosz, Scott Raye, Oliver Shupp, Tim Wilkinson, Tara Chambler, and John Smith to the active roster. The Las Vegas Sinners have moved Red Forman, Peter Hawkins, Jewerl McQuilken, Jack Douglas, Ellis Walker, Curtis Harris, Earl Finzer, Drederick Tatum, Kevin Nagel, John Parker, Troy Snead, Ralph Kelly, Harris McCafferty, and Matt Bentz to the inactive roster. |
| 01-01-1990 | The Las Vegas Sinners have moved John Parker to the active roster. |
| 12-25-1989 | The Las Vegas Sinners have moved Russ Kaiser and Brian Edwards to the active roster. The Las Vegas Sinners have moved John Parker and Sedric McClure to the inactive roster. |
| 12-10-1989 | John Parker of the Las Vegas Sinners is injured with a shoulder muscle strain and is expected to be out for approximately 23 days. |
| 08-05-1985 | The Las Vegas Sinners have moved Monte Lamb, Brian Edwards, Jarmar Kissell, Bill Ziegler, Bob Witman, Tom Morrison, Gary Ellard, Don Jackson, Amp Baker, Kevin Nagel, Milt Sullivan, John Mikeska, John Parker, Bill Matthews, and Sedric McClure to the active roster. The Las Vegas Sinners have moved Dobson McNabb, Carlton Spencer, Travis Shannon, Matthew Parkman, Dan Linderman, Chuck Brown, Jules O'Hara, Noah Petrelli, Mike Hutchence, Izzy Darkstar, Ken Kennedy, Korben Dallas, Phil Connors, Robert Grant, and Zion Wade to the inactive roster. |
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