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Independent NHL officiating analytics. Tracking referee performance through grounded stats and transparent methodology.

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← Officials

Referee profile

Tom Chmielewski#18

NHL Referee · 2025-26 · all · 244 games tracked

From
Scott AFB, IL
NHL Debut
4/8/14
Career Games
624
Playoff Games
4
Stripe Score
45.4
Below avg
Consistency Index
1.14
Lower = more consistent
Home Cooking
0.26
League ≈ 0
Leverage
D
OT/playoff vs base
Games
73
532 calls
Pen / 60
7.26
League 7.50
Gap Rhythm
255.2
Avg 6:06 / STDDEV s
Discipline
0.49
Misconducts + bench minors / 60
Make-Up Window
90%
Cross-team penalty within 10m
First Penalty
7:04
Avg time of first P1 call

In-game patterns

Methodology →
P1
6.70
P2
7.44
P3
7.56
OT
12.53
Calls per game in each period.
Late-period suppression
-49%
Calls 49% MORE penalties in final 2 min than proportional.
Power play chain rate
14%
14% of his power-play-creating penalties are followed by another call before the first PP expires.
Opening 5 vs closing 5
-0.65
Calls 0.65 more penalties per minute in P3's closing 5 than P1's opening 5 — finishes hot.

Score-state calling

Methodology →
Tied
1.78
1-goal
2.88
Blowout
1.36
Calls per game when the score margin is tied / 1-goal / 3+ goals.

Player-context calling

Methodology →
High-TOI vs Low-TOI ratio
0.30
Calls 70% fewer penalties on STAR / Top-6 players than ice time would predict — leniency to top forwards.

Call type breakdown

Methodology →
TRIPPING
1.21
Per game
89
Calls
43.9
League pct
ok
Sample
HIGH_STICKING
0.95
Per game
70
Calls
100.0
League pct
ok
Sample
ROUGHING
0.89
Per game

Teams under this referee

Methodology →
Canucks-6
9
Games
-0.67
Diff / game
24
Pens drawn
30
Pens taken
Drill in →
Oilers+1
8
Games
+0.13
Diff / game
29
Pens drawn

Most frequent partners

Partner data is navigation-only per launch stats catalog v2 §9. Pair-level rate stats carry small-sample warnings.

PartnerGames togetherSample
Pierre Lambert7ok
Jordan Samuels-Thomas6ok
Justin Kea5ok
Mitch Dunning5ok
Graedy Hamilton4small
Cody Beach4small
Carter Sandlak3small

Nationality splits

calls per 60 min of nationality TOI

Penalties on players of each nationality, normalized by that nationality's on-ice time in games this ref worked. Joint attribution: every penalty in a game credits both refs in the crew, so individual-call noise washes out at volume. Δ is the rate vs league baseline for the same nationality and scope. Rows under 60 minutes of nationality TOI are marked small; pattern language only — no intent claims.

NationalityTOICalls/ 60Lg baseΔSample
CAN222h 59m2451.101.10-0.00ok
USA156h 32m1460.930.95-0.01ok
SWE64h 48m45

Career history

all · per season

Per-season trend across the seasons RefGeek has tracked. Spot career arcs (improving / declining stripe score, drift in core rates) without flipping the season chip. Phase 2 will replace this table with a chart.

SeasonGamesStripePen / 60ConsistencySample
2025-267345.47.261.14ok
2024-255248.46.631.10ok
2023-246249.07.001.08ok
2022-235747.17.701.10ok
Coach challenges
97
97 challenges in scope; outcome detection still resolving.
One-goal P3 suppression
+5%
Calls 5% fewer P3 penalties in one-goal games than the league baseline.
65
Calls
46.3
League pct
ok
Sample
HOOKING
0.75
Per game
55
Calls
34.1
League pct
ok
Sample
HOLDING
0.61
Per game
45
Calls
26.8
League pct
ok
Sample
SLASHING
0.60
Per game
44
Calls
26.8
League pct
ok
Sample
INTERFERENCE
0.55
Per game
40
Calls
34.1
League pct
ok
Sample
FIGHTING_MAJOR
0.46
Per game
34
Calls
63.4
League pct
ok
Sample
UNSPORTSMANLIKE
0.30
Per game
22
Calls
55.0
League pct
ok
Sample
DELAY_OF_GAME
0.26
Per game
19
Calls
24.4
League pct
ok
Sample
CROSS_CHECKING
0.18
Per game
13
Calls
4.9
League pct
ok
Sample
TOO_MANY_MEN
0.16
Per game
12
Calls
55.3
League pct
ok
Sample
BOARDING
0.11
Per game
8
Calls
81.8
League pct
ok
Sample
INSTIGATOR
0.08
Per game
6
Calls
63.6
League pct
ok
Sample
GOALIE_INTERFERENCE
0.07
Per game
5
Calls
50.0
League pct
ok
Sample
EMBELLISHMENT
0.01
Per game
1
Calls
—
League pct
small
Sample
CHARGING
0.01
Per game
1
Calls
—
League pct
small
Sample
MATCH_PENALTY
0.01
Per game
1
Calls
—
League pct
small
Sample
KNEEING
0.01
Per game
1
Calls
—
League pct
small
Sample
ELBOWING
0.01
Per game
1
Calls
—
League pct
small
Sample
TypeCallsPer gameLeague pctSample
TRIPPING891.2143.9ok
HIGH_STICKING700.95100.0ok
ROUGHING650.8946.3ok
HOOKING550.7534.1ok
HOLDING450.6126.8ok
SLASHING440.6026.8ok
INTERFERENCE400.5534.1ok
FIGHTING_MAJOR340.4663.4ok
UNSPORTSMANLIKE220.3055.0ok
DELAY_OF_GAME190.2624.4ok
CROSS_CHECKING130.184.9ok
TOO_MANY_MEN120.1655.3ok
BOARDING80.1181.8ok
INSTIGATOR60.0863.6ok
GOALIE_INTERFERENCE50.0750.0ok
EMBELLISHMENT10.01—small
CHARGING10.01—small
MATCH_PENALTY10.01—small
KNEEING10.01—small
ELBOWING10.01—small
28
Pens taken
Drill in →
Jets-7
7
Games
-1.00
Diff / game
21
Pens drawn
28
Pens taken
Drill in →
Kings+4
7
Games
+0.57
Diff / game
23
Pens drawn
19
Pens taken
Drill in →
Sharks-2
7
Games
-0.29
Diff / game
21
Pens drawn
23
Pens taken
Drill in →
Kraken0
7
Games
0.00
Diff / game
26
Pens drawn
26
Pens taken
Drill in →
Devils-1
7
Games
-0.14
Diff / game
23
Pens drawn
24
Pens taken
Drill in →
Blues+4
6
Games
+0.67
Diff / game
24
Pens drawn
20
Pens taken
Drill in →
Avalanche+4
6
Games
+0.67
Diff / game
25
Pens drawn
21
Pens taken
Drill in →
Golden Knights+3
6
Games
+0.50
Diff / game
20
Pens drawn
17
Pens taken
Drill in →
Predators+3
6
Games
+0.50
Diff / game
20
Pens drawn
17
Pens taken
Drill in →
Maple Leafs-1
6
Games
-0.17
Diff / game
27
Pens drawn
28
Pens taken
Drill in →
Wild+8
6
Games
+1.33
Diff / game
20
Pens drawn
12
Pens taken
Drill in →
Canadiens-6
6
Games
-1.00
Diff / game
23
Pens drawn
29
Pens taken
Drill in →
Mammoth+3
5
Games
+0.60
Diff / game
23
Pens drawn
20
Pens taken
Drill in →
Blackhawks-1
5
Games
-0.20
Diff / game
19
Pens drawn
20
Pens taken
Drill in →
Flames-3
5
Games
-0.60
Diff / game
14
Pens drawn
17
Pens taken
Drill in →
Islanders0
4
Games
0.00
Diff / game
10
Pens drawn
10
Pens taken
Drill in →
Ducks-1
4
Games
-0.25
Diff / game
22
Pens drawn
23
Pens taken
Drill in →
Lightning-1
4
Games
-0.25
Diff / game
17
Pens drawn
18
Pens taken
Drill in →
Senators+3
4
Games
+0.75
Diff / game
17
Pens drawn
14
Pens taken
Drill in →
Panthers-3
4
Games
-0.75
Diff / game
13
Pens drawn
16
Pens taken
Drill in →
Penguins-3
3
Games
-1.00
Diff / game
6
Pens drawn
9
Pens taken
Drill in →
Hurricanes-5
3
Games
-1.67
Diff / game
15
Pens drawn
20
Pens taken
Drill in →
Flyers-2
3
Games
-0.67
Diff / game
9
Pens drawn
11
Pens taken
Drill in →
Capitals+5
3
Games
+1.67
Diff / game
20
Pens drawn
15
Pens taken
Drill in →
Bruins-1
2
Games
-0.50
Diff / game
9
Pens drawn
10
Pens taken
Drill in →
Blue Jackets+1
2
Games
+0.50
Diff / game
7
Pens drawn
6
Pens taken
Drill in →
Stars0
2
Games
0.00
Diff / game
5
Pens drawn
5
Pens taken
Drill in →
Red Wings+5
2
Games
+2.50
Diff / game
12
Pens drawn
7
Pens taken
Drill in →
Sabres0
2
Games
0.00
Diff / game
5
Pens drawn
5
Pens taken
Drill in →
Rangers-1
1
Games
-1.00
Diff / game
3
Pens drawn
4
Pens taken
Drill in →
TeamGamesPens drawnPens takenDiffDiff/GRecord
Canucks92430-6-0.673-6vs →
Oilers82928+1+0.135-3vs →
Jets72128-7-1.003-4vs →
Kings72319+4+0.575-2vs →
Sharks72123-2-0.292-5vs →
Kraken7262600.003-4vs →
Devils72324-1-0.143-4vs →
Blues62420+4+0.671-5vs →
Avalanche62521+4+0.674-2vs →
Golden Knights62017+3+0.504-2vs →
Predators62017+3+0.503-3vs →
Maple Leafs62728-1-0.172-4vs →
Wild62012+8+1.333-3vs →
Canadiens62329-6-1.004-2vs →
Mammoth52320+3+0.603-2vs →
Blackhawks51920-1-0.203-2vs →
Flames51417-3-0.602-3vs →
Islanders4101000.002-2vs →
Ducks42223-1-0.252-2vs →
Lightning41718-1-0.254-0vs →
Senators41714+3+0.751-3vs →
Panthers41316-3-0.751-3vs →
Penguins369-3-1.003-0vs →
Hurricanes31520-5-1.672-1vs →
Flyers3911-2-0.672-1vs →
Capitals32015+5+1.670-3vs →
Bruins2910-1-0.501-1vs →
Blue Jackets276+1+0.501-1vs →
Stars25500.002-0vs →
Red Wings2127+5+2.501-1vs →
Sabres25500.001-1vs →
Rangers134-1-1.000-1vs →
Corey Syvret
3
small
Chris Lee3small
Francis Charron3small
View all partners →
0.69
0.79
-0.09
ok
RUS36h 57m350.950.90+0.05ok
FIN31h 43m160.500.72-0.22ok
CZE21h 31m140.650.59+0.06ok
CHE9h 46m101.021.03-0.01ok
DEU4h 33m61.310.88+0.44ok
SVK4h 13m71.661.27+0.39ok
DNK3h 31m20.570.38+0.19ok
BLR3h 29m00.000.79-0.79ok
SVN2h 1m10.490.31+0.18ok
LVA1h 50m21.080.69+0.39ok
NOR1h 44m31.721.55+0.17ok
AUT1h 33m00.000.69-0.69ok
FRA1h 3m10.940.79+0.15ok
AUS1h 2m00.000.78-0.78ok
GBR10m00.003.32-3.32small
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