Diagnosis

The engine detects meaningful year-over-year changes, then runs an editable diagnostic rule base to rank hypotheses with evidence and confidence. Click any player for the full breakdown: what changed, why, and what a coach would do about it tomorrow.

#	Player	Pos	Biggest changes vs 2025	Change score
1	Bryce JohnsonSD	RF	xwOBA −.156 · xBA −.151 · xSLG −.240	107.6
2	Sam HaggertyTEX	LF	Hard-hit rate −35.0% · xwOBA −.122 · xSLG −.181	74.4
3	Rob RefsnyderSEA	DH	SLG −.265 · wOBA −.164 · AVG −.136	70.4
4	Ha-Seong KimATL	SS	SLG −.277 · AVG −.166 · wOBA −.157	69.4
5	Luis MoralesATH	SP	ERA +11.320 · xERA +6.860 · wOBA against +.269	67.8
6	Austin WynnsATL	C	SLG −.469 · wOBA −.264 · AVG −.216	64.8
7	Carter JensenKC	C	xSLG −.269 · xwOBA −.161 · xBA −.126	63.9
8	Andy IbáñezNYM	2B	wOBA −.194 · xwOBA −.140 · SLG −.265	62.1
9	Addison BargerTOR	RF	SLG −.363 · xSLG −.277 · AVG −.198	59.2
10	Jorge PolancoNYM	DH	SLG −.242 · xSLG −.171 · wOBA −.128	59
11	Cal RaleighSEA	C	SLG −.291 · xSLG −.196 · wOBA −.134	58.6
12	Otto KempPHI	LF	SLG −.331 · Pull rate −30.6% · Opposite-field rate +30.6%	58.4
13	Jahmai JonesBOS	OF	SLG −.290 · wOBA −.172 · AVG −.137	57.9
14	Austin SlaterTB	RF	Hard-hit rate −29.8% · xSLG −.240 · Avg exit velocity −7.0 mph	56.7
15	Pavin SmithAZ	1B	SLG −.242 · wOBA −.142 · AVG −.117	56.5
16	Romy GonzalezBOS	DH	AVG −.121 · SLG −.177 · xSLG −.135	56.1
17	Michael KellyATH	RP	ERA +13.020 · wOBA against +.255 · xERA +4.240	55.9
18	Billy CookPIT	RF	xBA −.258 · xwOBA −.241 · xSLG −.271	54.1
19	Alejandro KirkTOR	C	xSLG −.178 · xwOBA −.091 · Hard-hit rate −15.0%	53.8
20	Stuart FairchildCLE	CF	Whiff rate +38.3% · Zone contact −30.6% · Opposite-field rate −30.6%	53.2
21	George SpringerTOR	DH	xSLG −.195 · xwOBA −.100 · SLG −.174	52.3
22	Andrew McCutchenTEX	DH	xwOBA −.096 · xBA −.094 · xSLG −.150	48.5
23	Eric WagamanNYM	1B	Hard-hit rate −24.3% · Avg exit velocity −7.3 mph · Squared-up rate −11.3%	48.2
24	Kolby AllardCLE	RP	ERA +7.750 · wOBA against +.173 · xERA +3.250	48.1
25	Carlos SantanaAZ	1B	wOBA −.148 · xwOBA −.103 · AVG −.136	47.3
26	Christopher MorelMIA	1B	xSLG −.181 · SLG −.190 · Barrel rate −12.3%	46.9
27	Justin LawrenceWSH	RP	ERA +6.830 · wOBA against +.189 · xERA +3.530	45.6
28	Michael HelmanTEX	CF	Pull rate −18.3% · Max exit velocity −9.0 mph · Hard-hit rate −17.0%	43.4
29	Richie PalaciosTB	2B	Hard-hit rate −19.1% · AVG −.096 · xBA −.068	43.1
30	Bailey FalterKC	RP	ERA +9.520 · wOBA against +.224 · xERA +3.070	42.9
31	Chris MartinTEX	RP	ERA +6.020 · xERA +3.860 · wOBA against +.187	42.3
32	Lenyn SosaTOR	2B	xwOBA −.077 · SLG −.151 · wOBA −.100	42.1
33	Miles MastrobuoniSEA	3B	xwOBA −.134 · xBA −.130 · Strikeout rate +16.7%	41.7
34	Valente BellozoCOL	RP	xERA +6.250 · xwOBA against +.125 · ERA +2.940	41.5
35	Phil MatonCHC	RP	xERA +3.940 · xwOBA against +.125 · ERA +3.390	41.2
36	Nate EatonBOS	OF	Zone contact −21.7% · AVG −.171 · Whiff rate +17.5%	41.1
37	Corey SeagerTEX	SS	xSLG −.123 · AVG −.089 · xwOBA −.064	41.1
38	Jakob MarseeMIA	CF	SLG −.186 · xSLG −.131 · AVG −.096	40.8
39	Jerar EncarnacionSF	RF	Zone contact +17.5% · xSLG −.162 · Whiff rate −14.7%	40.6
40	Tyler BlackMIL	DH	Walk rate −34.9% · xwOBA −.240 · Pull rate −27.1%	40.4