Hi. Torn MCL alone doesn't warrant surgery as long its not come with a bone fragment. Also, depending on which part of the MCL is torn decides its management. If it's from the upper part and middle part you can apply plaster for 6 weeks don't put weight on the involved leg for 6 weeks and it usually will heal. If the tear is from the lower half then only surgery may give superior outcomes. Pls note these are for grade 3 MCL tears. Grade 1,2 tears should be managed conservatively always.