Insights · MLB

Sleeper Index

Top 100 prospects ranked by Sleeper Score — quality (their place on MLB Pipeline's published Top 100) ÷ card market (how much the hobby has already priced them in). Higher = more undervalued.

MLB Pipeline · captured Sep 7, 2026

Ranked

100

50 with card market

Top sleeper

Sebastian Walcott

Score 1.6

Movement

↑0 · ↓0

Coverage

50%

of Top 100 has a tracked market

SearchPositionHas card market only

100 prospects

			Pos	Org	Age / Lvl
#9	—	Sebastian Walcott 5 priced cards in DB	SS/3B	Texas Rangers	20 / AA	92	59	1.6
#8	—	Ryan Sloan 5 priced cards in DB	RHP	Seattle Mariners	20 / AA	93	61	1.5
#12	—	Theo Gillen 6 priced cards in DB	OF	Tampa Bay Rays	20 / AA	89	61	1.5
#1	—	Jesús Made 7 priced cards in DB	SS	Milwaukee Brewers	19 / AA	100	69	1.4
#2	—	Leo De Vries 6 priced cards in DB	SS/3B	Athletics	19 / AA	99	69	1.4
#3	—	Franklin Arias 8 priced cards in DB	SS	Boston Red Sox	20 / AAA	98	71	1.4
#18	—	Rainiel Rodriguez 6 priced cards in DB	C/1B	St. Louis Cardinals	19 / AA	83	61	1.4
#15	—	Walker Jenkins 6 priced cards in DB	OF	Minnesota Twins	21 / MLB	86	66	1.3
#13	—	Max Clark 6 priced cards in DB	OF	Detroit Tigers	21 / MLB	88	68	1.3
#17	—	Josuar Gonzalez 6 priced cards in DB	SS/2B	San Francisco Giants	18 / A	84	67	1.3
#14	—	George Lombard Jr. 7 priced cards in DB	SS/3B	New York Yankees	21 / MLB	87	70	1.2
#16	—	Mike Sirota 7 priced cards in DB	OF	Los Angeles Dodgers	23 / AA	85	69	1.2
#20	—	Eduardo Quintero 7 priced cards in DB	OF	Los Angeles Dodgers	20 / A+	81	66	1.2
#22	—	Alfredo Duno 7 priced cards in DB	C	Cincinnati Reds	20 / AA	79	65	1.2
#7	—	Seth Hernandez 29 priced cards in DB	RHP	Pittsburgh Pirates	20 / A+	94	90	1.0
#5	—	Kade Anderson 29 priced cards in DB	LHP	Seattle Mariners	22 / MLB	96	92	1.0
#4	—	Eli Willits 25 priced cards in DB	SS	Washington Nationals	18 / A+	97	95	1.0
#34	—	Kaelen Culpepper 6 priced cards in DB	SS	Minnesota Twins	23 / MLB	67	66	1.0
#30	—	Caleb Bonemer 6 priced cards in DB	3B/SS	Chicago White Sox	20 / AA	71	72	1.0
#37	—	Thomas White 6 priced cards in DB	LHP	Miami Marlins	21 / AAA	64	65	1.0
#38	—	Arjun Nimmala 7 priced cards in DB	SS	Los Angeles Angels	20 / AA	63	65	1.0
#43	—	Cam Caminiti 6 priced cards in DB	LHP	Atlanta Braves	20 / AA	58	61	1.0
#47	—	Jhonny Level 6 priced cards in DB	SS/2B	San Francisco Giants	19 / A+	54	61	0.9
#50	—	Felnin Celesten 5 priced cards in DB	SS	Seattle Mariners	20 / AA	51	58	0.9
#33	—	Gage Wood 23 priced cards in DB	RHP	Philadelphia Phillies	22 / AA	68	79	0.9
#26	—	JoJo Parker 24 priced cards in DB	SS	Toronto Blue Jays	20 / A+	75	88	0.9
#39	—	Josiah Hartshorn 20 priced cards in DB	OF/1B	Chicago Cubs	19 / A+	62	81	0.8
#52	—	Travis Sykora 6 priced cards in DB	RHP	Washington Nationals	22 / AA	49	68	0.7
#49	—	Anthony Eyanson 13 priced cards in DB	RHP	Baltimore Orioles	21 / AA	52	76	0.7
#51	—	Caden Bodine 22 priced cards in DB	C	Tampa Bay Rays	22 / AAA	50	75	0.7
#44	—	Liam Doyle 26 priced cards in DB	LHP	St. Louis Cardinals	22 / AA	57	88	0.6
#46	—	Tyler Bremner 21 priced cards in DB	RHP	Los Angeles Angels	22 / AA	55	85	0.6
#61	—	Aidan Miller 6 priced cards in DB	SS	Philadelphia Phillies	22 / A	40	63	0.6
#58	—	Charlie Condon 8 priced cards in DB	1B/OF	Colorado Rockies	23 / AAA	43	75	0.6
#60	—	Tate Southisene 17 priced cards in DB	SS/2B	Atlanta Braves	19 / AA	41	78	0.5
#73	—	Jonny Farmelo 7 priced cards in DB	OF	Seattle Mariners	21 / AA	28	54	0.5
#57	—	Jamie Arnold 20 priced cards in DB	LHP	Athletics	22 / AAA	44	90	0.5
#76	—	Jefferson Rojas 5 priced cards in DB	3B/SS	New York Mets	21 / AA	25	55	0.5
#62	—	Billy Carlson 16 priced cards in DB	SS	Chicago White Sox	20 / A	39	86	0.5
#66	—	River Ryan 54 priced cards in DB	RHP	Detroit Tigers	28 / AAA	35	79	0.4
#70	—	Josh Hammond 16 priced cards in DB	SS/3B	Kansas City Royals	19 / A	31	81	0.4
#83	—	Cooper Flemming 17 priced cards in DB	INF	Tampa Bay Rays	20 / A	18	75	0.2
#86	—	Dax Kilby 20 priced cards in DB	SS	New York Yankees	19 / A	15	86	0.2
#87	—	Charles Davalan 26 priced cards in DB	OF	Los Angeles Dodgers	22 / A+	14	83	0.2
#89	—	Joseph Dzierwa 19 priced cards in DB	LHP	Baltimore Orioles	22 / AA	12	77	0.2
#91	—	Steele Hall 21 priced cards in DB	SS	Cincinnati Reds	19 / A	10	88	0.1
#93	—	Xavier Neyens 19 priced cards in DB	3B/SS	Houston Astros	19 / A+	8	84	0.1
#94	—	Murf Gray 15 priced cards in DB	3B	Pittsburgh Pirates	22 / AA	7	85	0.1
#98	—	Brady Ebel 19 priced cards in DB	SS	Milwaukee Brewers	19 / A+	3	78	0.0
#100	—	Ike Irish 16 priced cards in DB	OF/1B	Baltimore Orioles	22 / A+	1	89	0.0
#6	—	Josue De Paula	OF	Los Angeles Dodgers	21 / AA	95	—	—
#10	—	Grady Emerson	SS	Tampa Bay Rays	18 / A	91	—	—
#11	—	Roch Cholowsky	SS	Chicago White Sox	21 / A+	90	—	—
#19	—	Vahn Lackey	C	Minnesota Twins	21 / A+	82	—	—
#21	—	Luis Peña	SS	Milwaukee Brewers	19 / AA	80	—	—
#23	—	Ethan Salas	C	San Diego Padres	20 / MLB	78	—	—
#24	—	Emil Morales	SS/3B	Los Angeles Dodgers	19 / A+	77	—	—
#25	—	Ethan Holliday	SS	Colorado Rockies	19 / A	76	—	—
#27	—	Luis Hernández	SS/3B	San Francisco Giants	17 / A	74	—	—
#28	—	Zyhir Hope	OF	Detroit Tigers	21 / AA	73	—	—
#29	—	Angel Genao	SS/3B	Cleveland Guardians	22 / MLB	72	—	—
#31	—	Jackson Flora	RHP	San Francisco Giants	21 / A	70	—	—
#32	—	Ralphy Velazquez	1B/OF	Cleveland Guardians	21 / AAA	69	—	—
#35	—	Edward Florentino	OF	Pittsburgh Pirates	19 / A+	66	—	—
#36	—	Christian Zazueta	RHP	Los Angeles Dodgers	21 / AA	65	—	—
#40	—	Eric Booth Jr.	OF	Baltimore Orioles	18 / A	61	—	—
#41	—	Drew Burress	OF	Athletics	21 / A	60	—	—
#42	—	Eric Hartman	OF	Atlanta Braves	20 / AA	59	—	—
#45	—	Michael Arroyo	OF/2B	Seattle Mariners	21 / MLB	56	—	—
#48	—	Bryce Rainer	SS	Detroit Tigers	21 / A+	53	—	—
#53	—	Robby Snelling	LHP	Miami Marlins	22 / MLB	48	—	—
#54	—	Kendry Chourio	RHP	Kansas City Royals	18 / A+	47	—	—
#55	—	Roldy Brito	OF/2B	Colorado Rockies	19 / A+	46	—	—
#56	—	Lazaro Montes	OF	Seattle Mariners	21 / MLB	45	—	—
#59	—	Joshua Báez	OF	St. Louis Cardinals	23 / MLB	42	—	—
#63	—	Aiva Arquette	SS	Miami Marlins	22 / AA	38	—	—
#64	—	Tyler Bell	SS	Colorado Rockies	21 / ROK	37	—	—
#65	—	Nathan Flewelling	C	Tampa Bay Rays	19 / A+	36	—	—
#67	—	Jacob Lombard	SS	Miami Marlins	18 / A	34	—	—
#68	—	Jarlin Susana	RHP	Washington Nationals	22 / AA	33	—	—
#69	—	Josue Briceño	C/1B	Detroit Tigers	21 / AAA	32	—	—
#71	—	Seaver King	SS/2B	Washington Nationals	23 / AAA	30	—	—
#72	—	Braylon Doughty	RHP	Cleveland Guardians	20 / AA	29	—	—
#74	—	Marek Houston	SS	Minnesota Twins	22 / AA	27	—	—
#75	—	Demetrio Crisantes	2B	Arizona Diamondbacks	22 / AAA	26	—	—
#77	—	Caden Scarborough	RHP	Texas Rangers	21 / A+	24	—	—
#78	—	Karson Milbrandt	RHP	Miami Marlins	22 / AAA	23	—	—
#79	—	Justin Gonzales	OF	Boston Red Sox	19 / AA	22	—	—
#80	—	Kevin Alvarez	OF	Houston Astros	18 / A	21	—	—
#81	—	Francisco Renteria	OF	Philadelphia Phillies	17 / ROK	20	—	—
#82	—	Juneiker Caceres	OF	Cleveland Guardians	19 / A+	19	—	—
#84	—	Angeibel Gomez	OF	Kansas City Royals	17 / ROK	17	—	—
#85	—	Cam Cannarella	OF	Miami Marlins	23 / AAA	16	—	—
#88	—	Josh Adamczewski	OF	Milwaukee Brewers	21 / AA	13	—	—
#90	—	Derek Curiel	OF	Pittsburgh Pirates	21 / ROK	11	—	—
#92	—	Owen Ayers	C/1B	Chicago Cubs	25 / AAA	9	—	—
#95	—	Nolan Perry	RHP	Toronto Blue Jays	23 / AA	6	—	—
#96	—	Gio Rojas	LHP	Texas Rangers	19 / ROK	5	—	—
#97	—	Caden Hunter	LHP	Baltimore Orioles	22 / AA	4	—	—
#99	—	Ramon Marquez	RHP	San Francisco Giants	20 / A+	2	—	—