So far this year the Leafs' blue line has been struggling with staying healthy and now with players like John Klingberg confirmed to be out for the rest of the year, the Leafs need to look for somebody to fill in on the back end.
While he may not be the flashiest player, the Leafs could plug him in on the bottom pair or middle pair and he could fend for himself. Borgen would also not cost too much as he is not as big of a name and could save the Leafs a lot in terms of value.