Fullback Franco Escobar missed four games because of a concussion and then three more after sustaining a chest injury.
Midfielder Miguel Almiron missed the final two games of the regular season with a hamstring strain.
Fullback Greg Garza suffered a shoulder injury in late May that sidelined him until the regular-season finale at Toronto. The team also saw injuries to Chris McCann and Ambrose at left fullback.
Midfielder Darlington Nagbe suffered a strained adductor in late June that sidelined him until September.