| Date | Transaction |
| 02-28-2022 | Owen DeRendt has retired from football. |
| 09-06-2021 | The Montreal Mastodon have waived Owen DeRendt. |
| 08-09-2021 | The Montreal Mastodon have moved David Williams to the active roster. The Montreal Mastodon have moved Owen DeRendt to the inactive roster. |
| 09-07-2020 | The Montreal Mastodon have moved Owen DeRendt to the active roster. The Montreal Mastodon have moved Adrian Burk to the inactive roster. |
| 08-17-2020 | The Montreal Mastodon have moved Adrian Burk to the active roster. The Montreal Mastodon have moved Owen DeRendt to the inactive roster. |
| 09-10-2018 | The Montreal Mastodon have moved Owen DeRendt to the active roster. The Montreal Mastodon have moved Virgil Carter to the inactive roster. |
| 09-02-2018 | The Montreal Mastodon have moved Virgil Carter to the active roster. The Montreal Mastodon have moved Owen DeRendt to the inactive roster. |
| 09-02-2018 | Owen DeRendt of the Montreal Mastodon is injured with a groin pull and is expected to be out for approximately 10 days. |
| 01-21-2018 | Trade #88925 has been completed between the Montreal Mastodon and the Las Vegas Night Stalkers. The Las Vegas Night Stalkers receive Draft Pick - 2019 Round 4 (MON) from the Montreal Mastodon in exchange for Jeff Powell (WR), Owen DeRendt (QB). |
| 11-19-2017 | The Las Vegas Night Stalkers have placed Owen DeRendt on the trade block. |
| 09-13-2015 | Trade #87433 has been completed between the Edmonton Frostbite and the Las Vegas Night Stalkers. The Las Vegas Night Stalkers receive Owen DeRendt (QB) from the Edmonton Frostbite in exchange for Draft Pick - 2016 Round 2 (LV). |
| 09-06-2015 | The Edmonton Frostbite have moved Owen DeRendt to the active roster. The Edmonton Frostbite have moved Dirk Cleftchin to the inactive roster. |
| 05-03-2015 | The Edmonton Frostbite have moved Jim Hill, Dirk Cleftchin, Garin Spencer, Bill Henry, and Drew Tripplett to the active roster. The Edmonton Frostbite have moved Owen DeRendt, Dagg Nabitt, Darrell Harris, Bobby Foster, and Leon Carroccio to the inactive roster. |
| 08-24-2014 | The Edmonton Frostbite have moved C. Dick Runn, Owen DeRendt, Charlie Simpson, Larry Zgotta-Bighead, and Dagg Nabitt to the active roster. The Edmonton Frostbite have moved Willie Campbell, Bobby Green, Drew Tripplett, Dirk Cleftchin, and Tim McGraw to the inactive roster. |
| 08-04-2014 | The Edmonton Frostbite have moved Adrian Frerotte, Forarm Shiver, Gary Scott, Ray Smith, Dick Welch, Dante Mingo, Dutch Byrdsong, Len Baker, and Carl Swanson to the active roster. The Edmonton Frostbite have moved Fernando El Kabong, Bill Jenke, Curly D'Agostino, Penny Larceny, Ralph Johnson, Larry Williams, Jesse Spani, Calvin Rosenbach, and Owen DeRendt to the inactive roster. |
| 09-02-2012 | The Edmonton Frostbite have moved Owen DeRendt and Johnny Lockhart to the active roster. The Edmonton Frostbite have moved Randy Kelly, Joey Bagadonuts, and Tim McGraw to the inactive roster. |
| 08-13-2012 | The Edmonton Frostbite have moved Randy Kelly to the active roster. The Edmonton Frostbite have moved Owen DeRendt to the inactive roster. |
| 01-09-2012 | The Edmonton Frostbite have placed Owen DeRendt on the Injured Reserve list for the remainder of the season. |
| 01-08-2012 | Owen DeRendt of the Edmonton Frostbite is injured with an ACL sprain and is expected to be out for approximately 25 days. |
| 08-22-2010 | The Edmonton Frostbite have changed Owen DeRent's name to Owen DeRendt. |
| 08-09-2010 | The Edmonton Frostbite have moved Owen DeRent and Derek Walsh to the active roster. The Edmonton Frostbite have moved Tom Duncan and Ralph Lollar to the inactive roster. |
| 11-09-2009 | The Edmonton Frostbite have moved George Dempsey, Johnny Lockhart, Art West, and R.J. Richard to the active roster. The Edmonton Frostbite have moved Owen DeRent, Knucklehead Jones, Jason Johnson, and Cary Thompson to the inactive roster. |
| 10-11-2009 | The Edmonton Frostbite have moved Owen DeRent, Knucklehead Jones, Bumfrick Manbun, Jason Johnson, Mike Moreno, and Sebron Tucker to the active roster. The Edmonton Frostbite have moved Art West, R.J. Richard, Chris P. Bacon, George Dempsey, Pete Washington, Ken Dubinetz, and Johnny Lockhart to the inactive roster. |
| 09-14-2009 | The Edmonton Frostbite have moved Todd McKinnie to the active roster. The Edmonton Frostbite have moved Owen DeRent to the inactive roster. |
| 05-03-2009 | The Edmonton Frostbite have moved Gadd Zookes, Owen DeRent, Hugo Hall, Bert Wunsch, and James Hugasian to the active roster. The Edmonton Frostbite have moved Mike Hall, Johnny Lockhart, R.J. Richard, John Lethridge, and Chris P. Bacon to the inactive roster. |
| 08-25-2008 | The Edmonton Frostbite have moved Joe Green, Izell Ragusa, Johnny Lockhart, Mark Zaeske, Ken Dubinetz, Chris P. Bacon, and R.J. Richard to the active roster. The Edmonton Frostbite have moved Al Rutkowski, Allen Klein, Knucklehead Jones, Bert Wunsch, Owen DeRent, Orville Saunders, and Gadd Zookes to the inactive roster. |
| 08-18-2008 | The Edmonton Frostbite have changed Owen Derrent's name to Owen DeRent. |
| 08-18-2008 | The Edmonton Frostbite have changed Romaro Ryczek's name to Owen Derrent. |
| 04-27-2008 | The Edmonton Frostbite have moved Biggie Smalls, Romaro Ryczek, Orville Saunders, Council McKyer, and Ron Ridgle to the active roster. The Edmonton Frostbite have moved Jack Walker, Joe Green, Peter Aldridge, Mark Zaeske, Ken Dubinetz, and Johnny Lockhart to the inactive roster. |
| 09-10-2007 | The Edmonton Frostbite have acquired Romaro Ryczek from the waiver wire. |
| 09-03-2007 | The Tulsa Osage have waived Romaro Ryczek. |
Quarterback