| Date | Team | |
|---|---|---|
| 06/25/18 | Guelph Royals | Villalona, Angel signed |
| 06/25/18 | Guelph Royals | Heurter, William released |
| 06/24/18 | Guelph Royals | Schmidt, Matt released |
| 06/24/18 | Guelph Royals | Waltenbury, Jon signed |
| 06/24/18 | Guelph Royals | Hicks, Liam signed |
| 06/24/18 | Guelph Royals | Cline, Justin released |
| 06/22/18 | Guelph Royals | Padilla, Narciso released |
| 06/22/18 | Guelph Royals | Procopio, Chris signed |
| 06/22/18 | Guelph Royals | Salemi, Sam released |
| 06/14/18 | Guelph Royals | Lambert, R.J. signed |
| 06/14/18 | Guelph Royals | Pereira, Mark released |
| 06/11/18 | Guelph Royals | Bent, Quinton placed on inactive list |
| 06/11/18 | Guelph Royals | Kidd, Marquis released |
| 06/11/18 | Guelph Royals | Mohan, Ethan signed |
| 06/09/18 | Guelph Royals | Pereira, Mark signed |
| 06/07/18 | Guelph Royals | Morris, Nathaniel signed |
| 06/05/18 | Burlington Herd | Miller, Clay placed on inactive list |
| 06/05/18 | Guelph Royals | Rossit, Adam signed |
| 05/31/18 | Guelph Royals | Hodgson, Nicholas released |
| 05/31/18 | Guelph Royals | Drury, Matthew released |
| 05/31/18 | Guelph Royals | Drury, Nathan released |
| 05/30/18 | Burlington Herd | Russell, Gavin released |
| 05/30/18 | Burlington Herd | Mistele, Brandon released |
| 05/30/18 | Guelph Royals | Drury, Matthew signed |
| 05/30/18 | Guelph Royals | Barlas, Darius signed |
| 05/24/18 | Burlington Herd | Bontempo, Derik released |
| 05/24/18 | Burlington Herd | Romanin, Mattingly signed |
| 05/19/18 | Burlington Herd | Bouillere-Howard, Casey signed |
| 05/19/18 | Burlington Herd | Boatto, Chris signed |
| 05/17/18 | Barrie Baycats | Arias, Santos signed |
| 05/16/18 | Guelph Royals | Kinsey, Ryan released |
| 05/12/18 | Guelph Royals | Drury, Nathan signed |
| 05/12/18 | Guelph Royals | Hodgson, Nicholas signed |
| 05/12/18 | Guelph Royals | Kinsey, Ryan signed |
| 05/12/18 | Guelph Royals | Nakashima, Chris released |
| 05/12/18 | Guelph Royals | Dallas-Blackburn, Nathan released |
| 05/10/18 | Burlington Herd | Okawa, Grant signed |
| 05/10/18 | Burlington Herd | Lamb, Cooper signed |
| 05/10/18 | Burlington Herd | OFarrell, Reese signed |
| 05/10/18 | Burlington Herd | Symington, Kyle signed |
| 05/10/18 | Burlington Herd | Braun, Ben signed |
| 05/07/18 | Burlington Herd | Patzalek, Tyler signed |
| 05/07/18 | Burlington Herd | Patzalek, Tyler signed |
| 05/07/18 | Burlington Herd | Zwolinski, Derek signed |
| 05/07/18 | Guelph Royals | Saunders, Darren signed |
| 05/07/18 | Guelph Royals | Reid, Ben signed |
| 05/07/18 | Guelph Royals | Marquez, Daniel signed |
| 05/03/18 | Guelph Royals | Salemi, Sam signed |
| 05/03/18 | Guelph Royals | Langille, Mark signed |
| 05/03/18 | Guelph Royals | Cline, Justin signed |
| 05/03/18 | Guelph Royals | Heurter, William signed |
| 05/03/18 | Guelph Royals | Bent, Quinton signed |
| 05/02/18 | Guelph Royals | Loder, Aaron placed on inactive list |
| 04/22/18 | Guelph Royals | MacLeod, Jeff signed |
| 04/22/18 | Guelph Royals | Keys, Brendan signed |
| 04/04/18 | Guelph Royals | Hatt, David signed |
| 03/23/18 | Guelph Royals | Javier, Edwin signed |
| 03/23/18 | Guelph Royals | Padilla, Narciso signed |
| 03/23/18 | Guelph Royals | Yambatis, Yunior signed |
| 03/23/18 | Guelph Royals | de la Cruz Paez, Jorge signed |
| 03/23/18 | Guelph Royals | Concepcion, Yomar signed |
| 12/12/17 | Guelph Royals | Reilly, Sean signed |
| 12/10/17 | Guelph Royals | Interisano, Justin signed |
| 12/10/17 | Guelph Royals | Garton, Josh signed |