Decision cost by category
Season to date · categories cover different scopes and aren't summed into a total — reliever selection is high-leverage spots only; the Relievers leaderboard shows a rolling 30-day window.
Cost by category
Philadelphia Phillies cost themselves 1.01 R from lineup decisions, 13.65 R from high-leverage reliever selection, 0.39 R from bunts, 0.11 R from intentional walks.
Season to date · shown per category, not summed — reliever selection is high-leverage spots only (the Relievers board uses a rolling 30-day window).
How this compares — league ranking
Lineup decisions
Don Mattingly ranks 6th of 30 managers in MLB.
- 1 Dave Roberts LAD 0.87 R
- 2 John Schneider TOR 1.08 R
- 3 Pat Murphy MIL 1.26 R
- 6 Don Mattingly PHI 1.01 R
- 28 Carlos Mendoza NYM 3.71 R
- 29 Joe Espada HOU 3.84 R
- 30 Will Venable CWS 4.08 R
Bunt decisions
Don Mattingly ranks 8th of 30 managers in MLB.
- 1 Walt Weiss ATL 0.00 R
- 2 Aaron Boone NYY 0.09 R
- 3 A.J. Hinch DET 0.39 R
- 8 Don Mattingly PHI 0.39 R
- 28 Torey Lovullo AZ 2.80 R
- 29 Pat Murphy MIL 2.76 R
- 30 Will Venable CWS 2.88 R
Intentional walks
Don Mattingly ranks 1st of 30 managers in MLB.
- 1 Don Mattingly PHI 0.11 R
- 2 Chad Tracy BOS 0.17 R
- 3 Walt Weiss ATL 0.33 R
- 28 Terry Francona CIN 2.90 R
- 29 Kurt Suzuki LAA 3.42 R
- 30 Pat Murphy MIL 4.11 R
Game-by-game breakdown
Last 7 in tenure · Δ R/GMost costly decisions
Flagged · click for detailPredecessor / successor
- Games
- 29
- Record
- 10-19
- Lineup cost
- 1.81 R (0.06 R/G)
- Bunts
- 0.00 R (0)
- IBBs
- 0.61 R (3)
- Games
- 47
- Record
- 30-17
- Lineup cost
- 1.01 R (0.02 R/G)
- Bunts
- 0.39 R (4)
- IBBs
- 0.11 R (1)
Don Mattingly took over on April 28, 2026 after Rob Thomson was fired. Through their first 47 games, Mattingly's lineup decisions cost 1.01 R compared to Thomson's 1.81 R across 29 games.
Tenure summary
Don Mattingly is the interim manager of the Philadelphia Phillies, having taken over on April 28, 2026.
Through 47 games of decision data, their tactical decisions cost the team an estimated 1.51 R across lineup construction, bunt strategy, and intentional walks. Lineup decisions accounted for 1.01 R of that — the largest single category.
The team's 30-17 record places them 13 games over .500.
Deep analytical views
The overview above is the SEO surface. Each link below opens the interactive analyzer for that decision type — sortable lists, per-game breakdowns, and the underlying numbers.
How this is calculated
Stats reflect only Don Mattingly's tenure as Phillies manager — events from before the start date or after the end date are excluded. Lineup cost is the difference between an optimized batting order and the one actually used, summed across regular-season games. Bunt and intentional-walk costs come from per-decision run-expectancy deltas. Pitching cost is the sum of pull-timing and reliever-selection runs lost. Costs are shown as a season total and a per-game rate (R/G); rankings compare this tenure's per-game rate against the league-wide distribution of current and recent manager tenures. RunsLeft does not assign letter grades — the costs and rankings are descriptive analytics.
Read the full methodology. Career managing history coming in v2 with Lahman integration.