NHL Line Changes & Fantasy Alerts: Sunday, Dec 21, 2025
9 games on Dec 21, 2025 produced 7 notable changes: 5 power-play changes (1 up, 4 down) and 2 line moves (2 promotions, 0 demotions). The biggest: Noah Hanifin moved onto the top power-play unit with Stone, Hertl and Marner, +4:58 of PP time (2 straight games).
Biggest changes
Noah Hanifin moved onto the top power-play unit with Stone, Hertl and Marner, +4:58 of PP time (2 straight games).
PP1 promotion · VGKGame reportTeam lines
Luke Hughes moved up to D1 with Pesce.
Line promotion · NJDGame reportTeam lines
Dylan Strome dropped off PP1 to the second unit.
Off PP1 · WSHGame reportTeam lines
Jakob Chychrun dropped off PP1 to the second unit.
Off PP1 · WSHGame reportTeam lines
Ondrej Palat dropped off PP1.
Off PP1 · NJDGame reportTeam lines
Changes by team
Noah Hanifin moved onto the top power-play unit with Stone, Hertl and Marner, +4:58 of PP time (2 straight games).
PP1 promotionGame reportTeam lines
Luke Hughes moved up to D1 with Pesce.
Line promotionGame reportTeam lines
Ondrej Palat dropped off PP1.
Off PP1Game reportTeam lines
Dylan Strome dropped off PP1 to the second unit.
Off PP1Game reportTeam lines
Jakob Chychrun dropped off PP1 to the second unit.
Off PP1Game reportTeam lines
Tom Wilson dropped off PP1 to the second unit.
Off PP1Game reportTeam lines
Connor McMichael moved up to L2 with Ovechkin and Sourdif.
Line promotionPickup alertGame reportTeam lines
How Line Watch works
- •Deployment is rebuilt from the official shift charts: the forward trio and defense pair a player shared the most 5-on-5 time with, and the power-play unit he spent most of the man advantage on.
- •Each game is compared with the player's previous five games (at least three), so a change means a change from his own recent role.
- •Changes that last only one game, come out of blowouts or move by a few seconds are filtered out. What remains is ranked by fantasy impact: first-unit power play and top-line moves first.
101 raw deployment changes were checked for this date; 7 passed.
FAQ
What is Line Watch?
Line Watch flags fantasy-relevant role changes from the NHL shift charts: players moving onto or off the first power-play unit, forwards and defensemen moving up or down the lineup, new defense partners, and big swings in ice time. Each night gets its own dated digest.
How is a line change detected?
After every game we rebuild each team's lines, pairs and power-play units from who was on the ice together, then compare every player with his own previous five games. A change only counts once the team has three games of history to compare against.
Why are some line changes left out?
Coaches shuffle lines constantly, so a one-game move is usually noise. Power-play and line moves must hold for at least two straight games (three after a blowout decided by 4+ goals). Ice-time swings must be at least three minutes, not come from a blowout, and either repeat or reach five minutes.
Where do goalie and injury alerts come from?
Goalie flips come from our starting-goalie snapshots, taken every 15 minutes: a different goalie listed, or a confirmed starter going back to expected. Injury notes come from the public injury report, matched to NHL players and limited to regular-lineup players.
Can I get these alerts by email?
Yes. Create a free account and follow as many players as you like from their player pages; you get one morning email with their changes. If you connect Yahoo, your roster's changes are included too. Every email links back to these free pages and has an unsubscribe link.