Seattle Mariners

SEA · AL West · 2026

Roster construction

Metric	Value	Lg avg	Diff	Rank
Plate appearances given to sub-replacement hitters	474	669	−195	9th of 30
Share of plate appearances given to sub-replacement hitters	11.6%	16.3%	−4.7%	9th of 30
WAR bled by sub-replacement hitters	-2.7	-2.2	−0.5	20th of 30
Count of sub-replacement hitters	6	5	+1	16th of 30
Batters faced by sub-replacement pitchers	145	760	−615	1st of 30
Share of batters faced by sub-replacement pitchers	3.7%	18.4%	−14.7%	1st of 30
WAR of the club's best position player	3.0	3.4	−0.4	19th of 30
Combined WAR of the club's three best position players	6.6	7.9	−1.3	23rd of 30
Combined WAR of the club's five best position players	9.2	10.8	−1.6	23rd of 30
Total position-player WAR	9.8	12.4	−2.6	24th of 30
Total pitching WAR	13.2	9.4	+3.8	7th of 30
Share of position-player WAR from the top three	67.3%	67.4%	−0.1%	14th of 30
Concentration of WAR across the lineup	0.31	0.40	−0.09	29th of 30
Position players with a 2+ WAR season	1	2	−1	25th of 30
Position players with a 4+ WAR season	0	0	—	7th of 30
Hitters used	22	20	+1	7th of 30
Plate-appearance-weighted batting age	28.9	28.4	+0.5	12th of 30
Plate appearances given to hitters 25 and under	627	950	−323	21st of 30
Share of plate appearances given to hitters 25 and under	15.4%	23.3%	−7.9%	21st of 30
Plate appearances given to hitters 35 and older	310	268	+41	13th of 30

Staff shape

Metric	Value	Lg avg	Diff	Rank
Pitchers used	18	25	−7	30th of 30
Rotation WAR	11.1	8.3	+2.8	8th of 30
Bullpen WAR	4.0	3.0	+1.0	11th of 30
Combined WAR of the club's three best starters	7.6	6.2	+1.4	7th of 30
Share of innings thrown by starters	67.5%	70.4%	−2.9%	21st of 30
Quality starts	49	35	+13	2nd of 30
Blown saves	16	15	—	19th of 30

Results

Metric	Value	Lg avg	Diff	Rank
Run differential	9	0	+9	12th of 30
Run differential per game	0.08	0.00	+0.08	12th of 30
Runs scored per game	4.04	4.51	−0.47	28th of 30
Runs allowed per game	3.95	4.51	−0.56	6th of 30
Winning percentage	.491	.500	−.009	20th of 30
Pythagorean winning percentage	.510	.501	+.009	12th of 30
Wins above Pythagorean expectation	-2.1	-0.1	−2.0	23rd of 30
Winning percentage in one-run games	.469	.499	−.030	18th of 30
Winning percentage in games decided by five or more	.483	.497	−.014	17th of 30
Winning percentage in extra innings	.545	.514	+.031	12th of 30
Home winning percentage	.566	.522	+.044	9th of 30
Road winning percentage	.418	.479	−.061	23rd of 30
Winning percentage within the division	.600	.500	+.100	5th of 30
Longest winning streak	8	6	+2	4th of 30

Batting

Metric	Value	Lg avg	Diff	Rank
Team Games	108	107	—	3rd of 30
Team Plate Appearances	4028	4064	−36	18th of 30
Team At Bats	3572	3610	−38	24th of 30
Team Runs	436	484	−48	28th of 30
Team Hits	825	881	−56	27th of 30
Team Doubles	131	168	−37	30th of 30
Team Triples	8	14	−6	27th of 30
Team Home Runs	129	124	+4	13th of 30
Team Runs Batted In	420	463	−43	27th of 30
Team Stolen Bases	79	73	+5	10th of 30
Team Walks	350	361	−11	19th of 30
Team Strikeouts	927	900	+26	20th of 30
Team Walk Rate	8.7%	8.9%	−0.2%	17th of 30
Team Strikeout Rate	23.0%	22.2%	+0.8%	22nd of 30
Team Batting Average	.231	.244	−.013	28th of 30
Team On-Base Percentage	.309	.319	−.010	24th of 30
Team Slugging Percentage	.380	.402	−.022	27th of 30
Team On-Base Plus Slugging	.689	.721	−.032	28th of 30

Pitching

Metric	Value	Lg avg	Diff	Rank
Team Wins	53	53	—	19th of 30
Team Losses	55	53	+1	19th of 30
Team Saves	25	27	−2	22nd of 30
Team Games	108	107	—	3rd of 30
Team Games Started	108	107	—	3rd of 30
Team Innings Pitched	954.1	951.2	+2.1	11th of 30
Team Innings per Game	8.8	8.9	−0.1	19th of 30
Team Strikeouts	917	900	+16	11th of 30
Team Strikeouts per 9 Innings	8.6	8.5	+0.1	13th of 30
Team Walks per 9 Innings	2.5	3.4	−0.9	1st of 30
Team Earned Run Average	3.71	4.20	−0.49	6th 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".