The first pairing of
Mattias Ekholm and
Evan Bouchard are one of the best in the league, but beyond them, Button is right that there's question marks.
Darnell Nurse significantly struggled in last year's playoffs, setting the record for worst plus/minus in playoff history.
Ty Emberson is a promising young player, but he's unproven with only 30 NHL games played.
Troy Stecher and
Brett Kulak are quality depth defenders, but definitely not significant players on a cup-contending team.