A 6-1 second-quarter advantage helped push the Blue Jays to a win.
Erica Evans scored a game-high six goals in the regular-season title clinching performance.
Five players were selected into the WPLL, too.
The Terps will take on the Blue Jays for the 111th time Saturday.
The Terps have a chance to win the Big Ten regular season title with a win over Johns Hopkins.
The Premier Lacrosse League features 23 former Terps.
Siverson was a star at Louisville before transferring and taking on a new role with the Terps.
Kyle Long featured on the first midfield line for the entirety of Saturday's win.
The Terps will take on rival Johns Hopkins on Saturday in their last regular-season game.
The Terps top tandem came up clutch again.