Seattle Mariners

SEA · AL West · 2026

Roster construction

Metric	Value	Lg avg	Diff	Rank
Plate appearances given to sub-replacement hitters	505	744	−239	10th of 30
Share of plate appearances given to sub-replacement hitters	10.2%	16.1%	−5.9%	10th of 30
WAR bled by sub-replacement hitters	-2.8	-2.4	−0.4	21st of 30
Count of sub-replacement hitters	6	5	—	15th of 30
Batters faced by sub-replacement pitchers	341	814	−473	3rd of 30
Share of batters faced by sub-replacement pitchers	7.7%	17.0%	−9.3%	4th of 30
WAR of the club's best position player	3.4	3.7	−0.3	17th of 30
Combined WAR of the club's three best position players	7.8	8.4	−0.6	18th of 30
Combined WAR of the club's five best position players	11.4	11.7	−0.3	17th of 30
Total position-player WAR	12.6	13.9	−1.3	19th of 30
Total pitching WAR	12.6	11.1	+1.5	13th of 30
Share of position-player WAR from the top three	61.9%	63.7%	−1.8%	15th of 30
Concentration of WAR across the lineup	0.35	0.41	−0.06	25th of 30
Position players with a 2+ WAR season	3	2	—	9th of 30
Position players with a 4+ WAR season	0	0	—	12th of 30
Hitters used	24	21	+2	5th of 30
Plate-appearance-weighted batting age	29.3	28.4	+0.9	10th of 30
Plate appearances given to hitters 25 and under	703	1059	−356	20th of 30
Share of plate appearances given to hitters 25 and under	14.1%	22.9%	−8.8%	23rd of 30
Plate appearances given to hitters 35 and older	322	292	+29	15th of 30

Staff shape

Metric	Value	Lg avg	Diff	Rank
Pitchers used	20	28	−8	30th of 30
Rotation WAR	11.1	9.8	+1.4	13th of 30
Bullpen WAR	3.2	3.7	−0.5	18th of 30
Combined WAR of the club's three best starters	7.7	6.9	+0.8	9th of 30
Share of innings thrown by starters	65.0%	70.9%	−5.9%	26th of 30
Quality starts	53	40	+12	2nd of 30
Blown saves	23	18	+4	23rd of 30

Results

Metric	Value	Lg avg	Diff	Rank
Run differential	-16	0	−16	17th of 30
Run differential per game	-0.14	0.00	−0.14	17th of 30
Runs scored per game	3.91	4.48	−0.58	30th of 30
Runs allowed per game	4.04	4.48	−0.44	7th of 30
Winning percentage	.475	.500	−.025	23rd of 30
Pythagorean winning percentage	.484	.501	−.017	17th of 30
Wins above Pythagorean expectation	-1.1	-0.1	−1.0	19th of 30
Winning percentage in one-run games	.472	.500	−.028	20th of 30
Winning percentage in games decided by five or more	.452	.498	−.046	21st of 30
Winning percentage in extra innings	.545	.514	+.030	12th of 30
Home winning percentage	.541	.524	+.016	11th of 30
Road winning percentage	.404	.476	−.072	26th of 30
Winning percentage within the division	.600	.499	+.101	5th of 30
Longest winning streak	8	6	+1	4th of 30

Batting

Metric	Value	Lg avg	Diff	Rank
Team Games	118	117	—	3rd of 30
Team Plate Appearances	4387	4441	−54	22nd of 30
Team At Bats	3892	3944	−52	23rd of 30
Team Runs	461	526	−65	30th of 30
Team Hits	893	961	−68	29th of 30
Team Doubles	142	183	−41	30th of 30
Team Triples	9	15	−6	28th of 30
Team Home Runs	137	135	+1	15th of 30
Team Runs Batted In	445	503	−58	29th of 30
Team Stolen Bases	84	80	+3	14th of 30
Team Walks	385	396	−11	18th of 30
Team Strikeouts	1005	983	+21	18th of 30
Team Walk Rate	8.8%	8.9%	−0.1%	15th of 30
Team Strikeout Rate	22.9%	22.1%	+0.8%	23rd of 30
Team Batting Average	.229	.244	−.015	29th of 30
Team On-Base Percentage	.308	.318	−.010	26th of 30
Team Slugging Percentage	.376	.401	−.025	29th of 30
Team On-Base Plus Slugging	.684	.719	−.035	28th of 30

Pitching

Metric	Value	Lg avg	Diff	Rank
Team Wins	56	58	−2	21st of 30
Team Losses	62	58	+3	23rd of 30
Team Saves	26	30	−4	24th of 30
Team Games	118	117	—	3rd of 30
Team Games Started	118	117	—	3rd of 30
Team Innings Pitched	1042.1	1040.2	+1.1	13th of 30
Team Innings per Game	8.8	8.9	−0.1	21st of 30
Team Strikeouts	1006	983	+22	12th of 30
Team Strikeouts per 9 Innings	8.7	8.5	+0.2	11th of 30
Team Walks per 9 Innings	2.5	3.4	−0.9	1st of 30
Team Earned Run Average	3.78	4.17	−0.39	8th of 30

Rank is among the MLB clubs with a value for that metric, best first. Descriptive metrics (roster age, WAR concentration) are ranked but not colored — for them, "high" isn't "good".