There are 3 real options for a call-up depending on how long Liles is out for.
1. Korbinian Holzer - He's been here before and although he's had his struggles, he can play on a 3rd pairing and bring a bit of an edge and penalty killing aspect to the game.
2. Simon Gysbers - Not the first choice on my list, but here's my reasoning on why the Leafs could justify bringing him up: A. repay for time in the system B. big guy that has been fairly reliable C. not high expectations and can play on the third pairing
3. Kevin Marshall - Now here's the interesting case. A new guy to the organization that has played above expected (4 points in 5 games with Marlies) and gives you the edge that you need on a third pairing. He has the ability to kill penalties and fight. Is that something that Carlyle likes? You bet. Is that something that you can rely on for up to 10 days? Undetermined.
Really, I don't think that these 3 choices from the organization are the right decision. To me, they don't give you anything of substance for lets say a week that Liles is out (at best). I think you have to make a trade before the game on tuesday.
Here's your answer: Ryan O'Byrne.
Colorado is not going to be close to a playoff spot. O'Byrne is a UFA at years end and they have a lot of money tied up with the back end already. I think you can get him fairly cheap. And by cheap I mean a 2nd or 3rd round pick because everyone is so close at the deadline and you'll have to overpay. But O'Byrne gives you that edge with quality NHL service. He's got a powerful right handed shot and his salary is cheap enough that if you want to resign him at the end of the year, you have that chance.