Linus Ullmark?

I chose not to use the letter U. He would be an OK backup here to free up the letter M, but would use one of the 1 year contract slots.

But can you do it with a 26 man roster?

There's never been a player with X at the front of their last name (https://en.wikipedia.org/wiki/List_of_NHL_players_(X to Z))

First name challenge? Can think of one in that case (Xavier Ouellet)

Did you ever hear the tragedy of Darth XPlagueis The Wise? I thought not. It’s not a story the Jedi would tell you. It’s a Sith legend. Darth XPlagueis was a Dark Lord of the Sith, so powerful and so wise he could use the Force to influence the midichlorians to create life… He had such a knowledge of the dark side that he could even keep the ones he cared about from dying. The dark side of the Force is a pathway to many abilities some consider to be unnatural. He became so powerful… the only thing he was afraid of was losing his power, which eventually, of course, he did. Unfortunately, he taught his apprentice everything he knew, then his apprentice killed him in his sleep. Ironic. He could save others from death, but not himself.