The HUT players ratings are available on Huthead.com
http://www.huthead.com/
You can't search for players though, but you have to use some sort of generator.
In general player rating are lower than in NHL 15.
The Flames players I found:
Mark Giordano 87
TJ Brodie 86
Johnny Gaudreau 84 (which is the same rating as Zach Kassian
)
Michael Frolik 84
Lance Bouma 82
Matt Stajan 82
Mikael Backlund 82
Michael Ferland 82
Mason Raymond 82
I believe Monahan is 87 as well.
And some prospects: (silver and bronze players)
Joni Ortio 81
Drew Shore 81
Bill Arnold 80
Hunter Smith 77
Morgan Klimchuk 76
Brett Kulak 75
Mason McDonald 74
Andrew Mangiapane 72