Edit: mis-read your post. You mean they've lost 4 in a row WITH Rantanen in line-up, which is true.
I'll leave the rest of my post up.
They haven't lost their last 4 since they beat Utah 7-3 in the last game before break. Rantanen actually didn't play that game, which is their only win this month.
They're 1-4 in February.
They're 3-4-1 since picking up Rantanen.
Lost in OT to NYI
Beat Chicago, NYR & Utah
Lost to LAK, Winnipeg, Minnesota & Toronto
But, yes, they've been sucking lately & Rantanen doesn't seem to be helping - yet anyway.