The OASA welcome all Associations and teams to advertise their own tournaments with us. Please send all information regarding your tournament to dave.northern1@gmail.com
| Date | Series | Location | Contact Info | Details |
| May 30 – June 2 | U13, U15, U17, and U20 Boys | North Waterloo | Mike Carey, mcarey@wilmotthunder.com | http://www.northwaterloofastpitch.com/article/90054 |
| June 21 – 23, 2024 | U11, U13, U15 Boys | Tara | Ryan Greig, ryan_greig@hotmail.com | TaraTwins.com |
| June 21-23 | U11 | Frankford | Brian, frankfordflyersfastball@gmail.com | Frankford Flyers Facebook |
| May 25 | U17 | Havelock | Cheryl Levesque, m_r_jewel@hotmail.com | Havelock Express |
| June 1 | U15 | Havelock | Cheryl Levesque, m_r_jewel@hotmail.com | Havelock Express |
| June 15 | U13 | Havelock | Cheryl Levesque, m_r_jewel@hotmail.com | Havelock Express |
| June 22 | U11 | Havelock | Cheryl Levesque, m_r_jewel@hotmail.com | Havelock Express |
| July 20 | U9 | Havelock | Cheryl Levesque, m_r_jewel@hotmail.com | Havelock Express |
| May 24-25 | U11 and U13 | Oshawa | Wes Vezza, wesvezza@gmail.com | Oshawa BBs |
