Toronto capture Koevermans and Frings

The 34-year-old Frings and 32-year-old Koevermans became two of the club's "designated players" who are paid mainly outside the team's salary cap and will begin playing after July 15 when the MLS transfer window opens.

"We have added two very important players with significant experience and technical ability," Toronto head coach Aron Winter said in a statement.

"Torsten and Danny will make an immediate impact at our club. Signing Torsten and Danny is a very important step in building a team that our fans are proud to support."

Financial terms of the deals were not disclosed with the club saying simply that the players had signed "multi-year" contracts.

MLS clubs are allowed to sign up to three "designated players" enabling them to bring top international names to the league such as LA Galaxy's David Beckham.