This is the 2024-25 edition — an archived read. Read the 2026-27 report →
Mason Lohrei
Boston Bruins Defense
Six foot five and moves the puck like a smaller man — and twelve fewer goals conceded on his ice than the chances said.
| Season | Team | GP | G | A | PTS | +/- | PIM | PP | SH | GW | S | S% | TOI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-24 | BOS | 41 | 4 | 9 | 13 | -2 | 18 | 1 | 0 | 1 | 43 | 9.3 | 16:57 |
| 2024-25 so far | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 41 | 4 | 9 | 13 | -2 | 18 | 1 | 0 | 1 | 43 | 9.3 | 16:57 |
This Season So Far
The 2024-25 season has not started. The empty row above is his, and both it and this paragraph fill in on their own from the morning after he first plays: what he has done, what it is worth against his own last season, and the run he is on when the two disagree.
Last Season
4 goals and 9 assists in 41 games — 13 points at 16:57 a night, minus-2, with 1 power-play goal and 1 game-winner on 43 shots at 9.30 per cent, and 18 penalty minutes. His first NHL season, at 23.
48.2 per cent of the expected goals at five-on-five over 644 minutes, the 39th percentile. His ice went 24-15 against an expectation of 24.96-26.84 — twelve fewer goals conceded than the chances predicted, which on this club was normal and belonged to the goaltender.
The Finesse Game
43 attempts at a median of 43 feet, with 57 per cent from beyond 40 and 14 per cent from inside 20, converting at 9.30 per cent.
The puck-moving is why he is here and it is genuinely good for the size — he escapes a first forechecker by turning rather than by throwing it away, and he carries it out of his own zone and gains the offensive line under control. Thirteen points in forty-one games as a rookie defenceman is a real rate.
He will attempt the pass through the middle that a coach does not want, and it goes wrong often enough to be part of the report.
The Physical Game
6-5 and 218, and he does not defend the way that suggests. He does not clear the front of his own net by force and he loses more battles in the corner than a man that size should.
18 penalty minutes in 41 games. He does not retaliate and he is not an agitator, and the strength is a year or two away.
The Intangibles
Fifty-eighth overall in 2020, three years at Ohio State, and an NHL regular at 23.
A 6-5 defenceman who moves the puck like a 5-11 one is the most valuable single profile in the modern game, and the whole question is whether the defending catches up. Forty-one games is not an answer.
The numbers underneath
On the ice
Five-on-five, 2023-24 · 644 minutes
- Expected goals
- 48.2%
- 39th pct
- Shot attempts
- 46.6%
- 24th pct
share of the chances while he was out there
share of the attempts while he was out there
Goals while he was on the ice: 24 for, 15 against. Expected: 25.0 and 26.8.
The eye and the numbers
HindsightThe two rank him within 1 points of one another. It was written for a back edition, with the seasons that followed already known. Neither the agreement nor the gap says anything about the eye, and this report is excluded from the club-level comparison for the same reason.
Both bars are percentiles among the 41 skaters in this edition with a report and enough ice time. The report bar ranks the mean of the grades above — 63 on their own scale — against every other report's mean. The numbers bar ranks his share of expected goals. A gap is a disagreement about where he belongs, not two scales talking past each other.
Usual linemates
2023-24 · 644 minutes at five-on-five
- Kevin Shattenkirkoff the roster28%
Share of his five-on-five ice time spent alongside each player, measured from shift charts. Special teams are excluded: a power-play unit is not a line.
Why the numbers land there
Five-on-five, 2023-24
- The club
- BOS took 49.7% of the expected goals as a club. His own share is 48.2% — 1.5 below the club he did it on.
- The role
- 644 minutes at five-on-five — 28th percentile in ice time.
With and without
| Teammate | Together | Him apart | Mate apart |
|---|---|---|---|
| Charlie McAvoy | 47.1% | 48.9% | 53.0% |
| David Pastrnak | 51.2% | 46.4% | 51.8% |
| Pavel Zacha | 47.4% | 48.5% | 50.1% |
47.1% together, 48.9% for him apart and 53.0% for McAvoy apart. McAvoy was better away from him while his own share held, which is a mark against him more than for him.
Expected-goal share while both were on the ice, and for each man in the minutes he played without the other. Apart is the pair subtracted from his own totals. It does not settle who was carrying whom — apart from each other, both were still playing with somebody — but it does say whether the share travelled when the pairing broke up.
Where he shoots from
goal on goal missed
58 unblocked shots in 2023-24, 4 of them goals. His median goal came from 31 feet. 14% of his shots came from inside twenty feet, 57% from beyond forty.