via NHLOfficials,

The National Hockey League has 33 Full-Time Referees and 33 Full-Time Linesmen during the season. Only a portion of these officials get to work the Stanley Cup Playoffs. Below is the number of officials needed for each round of the Stanley Cup Playoffs.

1st ROUND – 20 Referees and 20 Linesmen
2nd ROUND – 12 Referees and 12 Linesmen
3rd ROUND – 8 Referees and 8 Linesmen
STANLEY CUP FINALS – 4 Referees and 4 Linesmen

2016 STANLEY CUP PLAYOFFS – 1ST ROUND

Here are the NHL officials selected today by the National Hockey League to work the 2016 NHL Playoffs.

REFEREES
Francis Charron, Gord Dwyer, Eric Furlatt, Jean Hebert, Dave Jackson, Marc Joannette, Steve Kozari, Frederick L’Ecuyer, Chris Lee, Wes McCauley, Brad Meier, Dan O'Halloran, Dan O'Rourke, Tim Peel, Kevin Pollock, Chris Rooney, Francois St.Laurent, Kelly Sutherland, Ian Walsh & Brad Watson.
Standby Referees: Trevor Hanson & Graham Skilliter.

LINESMEN
Derek Amell, Steve Barton, David Brisebois, Scott Cherrey, Michel Cormier, Greg Devorski, Scott Driscoll, Ryan Galloway, Shane Heyer, Brad Kovachik, Matt MacPherson, Steve Miller, Brian Murphy, Jonny Murray, Derek Nansen, Tim Nowak, Brian Pancich, Pierre Racicot, Jay Sharrers & Mark Shewchyk.
Standby Linesmen: Trent Knorr & Kiel Murchison.