In terms of the UDFA signings, I was interested in Jaxon Nelson who went to the Bruins and Quillan who is now in Toronto's system. Nelson because he's a big'un and plays shutdown center type minutes with some timely scoring while Quillan is always working.
Cornell kid who is now a 5th year in Gabriel Seger might be a guy since there isn't much size at center in the fold -
Gabriel Seger at eliteprospects.com
This guy, Gleb Veremyev, is another one who plays center some and has size on his side:
Gleb Veremyev at eliteprospects.com He is only a sophomore though.
TJ Hughes (no relation to the Hughes brothers or even to the OTHER Jack Hughes) works his sack off for the Wolverines but he's sub 6' and under 190 lbs so I wonder how long that style works as a pro. But I like the ignition.
T.J. Hughes at eliteprospects.com He is also only a sophomore.
There aren't a lot of high-end UDFA in the NCAA any more. It's pretty well scouted and picked through but in terms of organizational depth, high-work rate, tenacious players and particularly right shot (and right shot defensive defensemen) would be places to look.