The Toronto Maple Leafs continue to catch some really tough breaks up front.With Austin Matthews missing at least the first three games and Ilya Mikheyev out at least eight weeks they might be dealing with another injury.Forward Mitch Marner was forced to leave practice today after sustaining an injury.The injury happened after Wayne Simmonds tripped up Marner and Marner went down really hard.More details to come on how serious the injury really is.