Who Should I Trade?

Jhonathan Diaz for William Kempner (2026)

Summary
Stats
Projections
News & Notes
Schedule

Who Should I Trade? Player Summaries
	Experts' Pick
	William Kempner RP - MIA	Jhonathan Diaz RP - SEA
Expert Recommendation	100% Recommended by 1 of 1 experts	0% Recommended by 0 of 1 experts
Rankings

Rest of Season	‐	‐
VBR	# 764	# 966

Projections

Strikeouts	10	4
Wins	1	0
Saves	0	0
ERA	4.12	3.66
WHIP	1.53	1.29

Misc

Injury Alert	IL15	MiLB

Expert Ranks

Kelly Kirby FantasyPros	# 392	‐

Who Should I Trade? Player Statistics
	William Kempner RP - MIA	Jhonathan Diaz RP - SEA
2026 Stats


Games Played	9	‐

Games Started	0	‐

Innings Pitched	12.1	‐

Wins	1	‐

Losses	0	‐

Saves	0	‐

Blown Saves	0	‐

Holds	0	‐

Hits Allowed	8	‐

Earned Runs	4	‐

Home Runs Allowed	1	‐

Strikeouts	14	‐

Walks	4	‐

ERA	2.92	‐

WHIP	0.97	‐

Who Should I Trade? Player Projections
	William Kempner RP - MIA	Jhonathan Diaz RP - SEA
2026 Projections


Games Played	11	9

Games Started	0	1

Innings Pitched	9.0	4.9

Wins	1	0

Losses	1	0

Saves	0	0

Blown Saves	0	0

Holds	0	0

Hits Allowed	8	5

Earned Runs	4	2

Home Runs Allowed	1	1

Strikeouts	10	4

Walks	5	1

ERA	4.12	3.66

WHIP	1.53	1.29

Who Should I Trade? Player Notes
	William Kempner RP - MIA	Jhonathan Diaz RP - SEA
News
	William Kempner remains shut down from throwing. Ari Koslow Fri, Jul 17th	Lefthander Jhonathan Diaz has been reassigned to minor league camp by the Seattle Mariners. David Leisering Fri, Mar 20th
	The Miami Marlins placed William Kempner on the 15-day injured list on Sunday due to a right elbow sprain. Nicholas Rodriguez Sun, Jul 12th	The Mariners have signed left-hander Jhonathan Diaz to a minor-league deal. Brenton Kemp Tue, Feb 10th
	The Marlins recalled William Kempner from Triple-A Jacksonville. Ari Koslow Fri, Jul 3rd	The Mariners have outrighted left-hander Jhonathan Diaz to Triple-A Tacoma. Brenton Kemp Wed, Jan 28th
	The Marlins optioned RHP Will Kempner to Triple-A Jacksonville. Ari Koslow Tue, Jun 16th	The Mariners designated LHP Jhonathan Díaz for assignment. Ari Koslow Fri, Jan 23rd
	The Marlins recalled RHP William Kempner from Triple-A Jacksoville. Ari Koslow Sat, May 30th
Notes
There are no recent notes for these players

Who Should I Trade? Player Schedules
Date	Opp	Opp Pitcher	VBR	Opp	Opp Pitcher	VBR
	William Kempner RP - MIA			Jhonathan Diaz RP - SEA
Thu, Mar 26th				vs CLE	Tanner Bibee (4-9)	#51
Fri, Mar 27th	vs COL	Kyle Freeland (2-9)	#240	vs CLE	Gavin Williams (10-5)	#26
Sat, Mar 28th	vs COL	Michael Lorenzen (3-9)	#428	vs CLE	Joey Cantillo (8-5)	#74
Sun, Mar 29th	vs COL	Jose Quintana (2-3)	#431	vs CLE	Slade Cecconi (4-6)	#104
Mon, Mar 30th	vs CWS	Davis Martin (9-5)	#92	vs NYY	Ryan Weathers (3-7)	#57
Tue, Mar 31st	vs CWS	Erick Fedde (5-6)	#407	vs NYY	Max Fried (4-3)	#24
Wed, Apr 1st	vs CWS	Shane Smith (0-2)	#150	vs NYY	Cam Schlittler (9-6)	#22
Fri, Apr 3rd	@ NYY	Will Warren (7-4)	#65	@ LAA	Reid Detmers (3-6)	#43
Sat, Apr 4th	@ NYY	Ryan Weathers (3-7)	#57	@ LAA	Jack Kochanowicz (2-5)
Sun, Apr 5th	@ NYY	Max Fried (4-3)	#24	@ LAA	George Klassen (0-1)	#326
Mon, Apr 6th	vs CIN	Brandon Williamson (2-3)	#423	@ TEX	Jacob deGrom (7-6)	#8
Tue, Apr 7th	vs CIN	Andrew Abbott (5-6)	#105	@ TEX	Nathan Eovaldi (9-8)	#17
Wed, Apr 8th	vs CIN	Brady Singer (4-9)	#148	@ TEX	MacKenzie Gore (6-8)	#35
Fri, Apr 10th	@ DET	Keider Montero (6-5)	#160	vs HOU	Tatsuya Imai (6-4)	#129
Sat, Apr 11th	@ DET	Casey Mize (4-6)	#39	vs HOU	Lance McCullers Jr. (2-3)	#198
Sun, Apr 12th	@ DET	Tarik Skubal (6-5)	#2	vs HOU	Cody Bolton (0-1)	#320
Mon, Apr 13th	@ ATL	Grant Holmes (6-4)	#152	vs HOU	Mike Burrows (4-9)	#178
Tue, Apr 14th	@ ATL	Reynaldo Lopez (4-3)	#90	@ SD	Michael King (6-7)	#50
Wed, Apr 15th	@ ATL	Bryce Elder (6-6)	#126	@ SD	Randy Vasquez (6-6)	#269
Thu, Apr 16th				@ SD	Walker Buehler (6-5)	#190
Fri, Apr 17th	vs MIL	Coleman Crow (0-1)	#249	vs TEX	Jacob deGrom (7-6)	#8
Sat, Apr 18th	vs MIL	Brandon Woodruff (2-2)		vs TEX	Nathan Eovaldi (9-8)	#17
Sun, Apr 19th	vs MIL	Jacob Misiorowski (10-4)	#7	vs TEX	MacKenzie Gore (6-8)	#35
Mon, Apr 20th	vs STL	Michael McGreevy (4-7)	#88	vs ATH	J.T. Ginn (8-6)	#144
Tue, Apr 21st	vs STL	Dustin May (5-7)	#45	vs ATH	Jacob Lopez (4-4)	#220
Wed, Apr 22nd	vs STL	Kyle Leahy (7-4)	#119	vs ATH	Aaron Civale (5-7)	#236
Fri, Apr 24th	@ SF	Adrian Houser (2-7)	#192	@ STL	Andre Pallante (10-6)	#133
Sat, Apr 25th	@ SF	Robbie Ray (8-6)	#87	@ STL	Matthew Liberatore (5-7)	#110
Sun, Apr 26th	@ SF	Landen Roupp (7-8)	#56	@ STL	Michael McGreevy (4-7)	#88
Mon, Apr 27th	@ LAD	Yoshinobu Yamamoto (10-6)	#12	@ MIN	Connor Prielipp (2-5)	#118
Tue, Apr 28th	@ LAD	Shohei Ohtani (8-2)	#1	@ MIN	Joe Ryan (6-6)	#14
Wed, Apr 29th	@ LAD	Tyler Glasnow (3-0)	#75	@ MIN	Taj Bradley (9-4)	#46
Fri, May 1st	vs PHI	Zack Wheeler (10-2)	#5	vs KC	Cole Ragans (1-4)
Sat, May 2nd	vs PHI	Andrew Painter (1-8)	#250	vs KC	Seth Lugo (3-6)	#140
Sun, May 3rd	vs PHI	Jesus Luzardo (9-4)	#10	vs KC	Kris Bubic (3-2)	#128
Mon, May 4th	vs PHI	Aaron Nola (3-7)	#52	vs ATL	JR Ritchie (1-2)	#295
Tue, May 5th	vs BAL	Chris Bassitt (4-4)	#206	vs ATL	Bryce Elder (6-6)	#126
Wed, May 6th	vs BAL	Brandon Young (8-2)	#131	vs ATL	Martin Perez (6-6)	#181
Fri, May 8th	vs WSH	Foster Griffin (11-2)	#63	@ CWS	Sean Burke (7-4)	#86
Sat, May 9th	vs WSH	Richard Lovelady (2-4)	#387	@ CWS	Anthony Kay (6-4)	#200
Sun, May 10th	vs WSH	Cade Cavalli (6-4)	#64	@ CWS	Davis Martin (9-5)	#92
Mon, May 11th				@ HOU	Peter Lambert (8-5)	#136
Tue, May 12th	@ MIN	Bailey Ober (7-3)	#89	@ HOU	Tatsuya Imai (6-4)	#129
Wed, May 13th	@ MIN	Simeon Woods Richardson (1-7)	#370	@ HOU	Lance McCullers Jr. (2-3)	#198
Thu, May 14th	@ MIN	Zebby Matthews (4-7)	#109	@ HOU	Mike Burrows (4-9)	#178
Fri, May 15th	@ TB	Ian Seymour (6-2)	#76	vs SD	Randy Vasquez (6-6)	#269
Sat, May 16th	@ TB	Nick Martinez (9-2)	#103	vs SD	Walker Buehler (6-5)	#190
Sun, May 17th	@ TB	Drew Rasmussen (8-5)	#18	vs SD	Lucas Giolito (2-3)	#344
Mon, May 18th	vs ATL	JR Ritchie (1-2)	#295	vs CWS	Noah Schultz (3-7)	#213
Tue, May 19th	vs ATL	Martin Perez (6-6)	#181	vs CWS	Anthony Kay (6-4)	#200
Wed, May 20th	vs ATL	Chris Sale (10-6)	#6	vs CWS	Sean Burke (7-4)	#86
Fri, May 22nd	vs NYM	Tobias Myers (0-2)	#215	@ KC	Noah Cameron (5-8)	#79
Sat, May 23rd	vs NYM	Freddy Peralta (5-9)	#42	@ KC	Stephen Kolek (4-3)	#223
Sun, May 24th	vs NYM	Christian Scott (3-1)	#62	@ KC	Seth Lugo (3-6)	#140
Mon, May 25th	@ TOR	Trey Yesavage (4-5)	#82	@ ATH	Aaron Civale (5-7)	#236
Tue, May 26th	@ TOR	Braydon Fisher (3-3)	#156	@ ATH	Gage Jump (3-5)	#91
Wed, May 27th	@ TOR	Kevin Gausman (4-9)	#19	@ ATH	Jeffrey Springs (3-9)	#189
Fri, May 29th	@ NYM	Freddy Peralta (5-9)	#42	vs ARI	Zac Gallen (3-9)	#169
Sat, May 30th	@ NYM	Christian Scott (3-1)	#62	vs ARI	Ryne Nelson (3-5)	#207
Sun, May 31st	@ NYM	Nolan McLean (7-6)	#32	vs ARI	Merrill Kelly (7-8)	#114
Mon, Jun 1st	@ WSH	Cade Cavalli (6-4)	#64	vs NYM	Austin Warren
Tue, Jun 2nd	@ WSH	Richard Lovelady (2-4)	#387	vs NYM	Huascar Brazoban (4-2)	#201
Wed, Jun 3rd	@ WSH	Andrew Alvarez (2-3)	#151	vs NYM	Freddy Peralta (5-9)	#42
Fri, Jun 5th	vs TB	Drew Rasmussen (8-5)	#18	@ DET	Framber Valdez (5-7)	#29
Sat, Jun 6th	vs TB	Shane McClanahan (8-6)	#34	@ DET	Keider Montero (6-5)	#160
Sun, Jun 7th	vs TB	Griffin Jax (5-7)	#60	@ DET	Jack Flaherty (3-8)	#54
Mon, Jun 8th				@ BAL	Trey Gibson (1-3)	#313
Tue, Jun 9th	vs ARI	Zac Gallen (3-9)	#169	@ BAL	Trevor Rogers (6-7)	#70
Wed, Jun 10th	vs ARI	Ryne Nelson (3-5)	#207	@ BAL	Brandon Young (8-2)	#131
Thu, Jun 11th	vs ARI	Merrill Kelly (7-8)	#114	@ BAL	Kyle Bradish (6-9)	#40
Fri, Jun 12th	@ PIT	Braxton Ashcraft (9-4)	#25	@ WSH	Zack Littell (7-7)	#179
Sat, Jun 13th	@ PIT	Bubba Chandler (3-8)	#123	@ WSH	Cade Cavalli (6-4)	#64
Sun, Jun 14th	@ PIT	Paul Skenes (9-8)	#3	@ WSH	PJ Poulin (3-0)	#287
Tue, Jun 16th	@ PHI	Jesus Luzardo (9-4)	#10	vs BAL	Brandon Young (8-2)	#131
Wed, Jun 17th	@ PHI	Andrew Painter (1-8)	#250	vs BAL	Kyle Bradish (6-9)	#40
Thu, Jun 18th				vs BAL	Shane Baz (4-9)	#68
Fri, Jun 19th	vs SF	Landen Roupp (7-8)	#56	vs BOS	Ranger Suarez (4-3)	#28
Sat, Jun 20th	vs SF	Trevor McDonald (3-7)	#168	vs BOS	Connelly Early (7-5)	#138
Sun, Jun 21st	vs SF	Logan Webb (5-7)	#15	vs BOS	Payton Tolle (5-6)	#59
Tue, Jun 23rd	vs TEX	Cal Quantrill (3-2)	#318	@ PIT	Mitch Keller (6-7)	#112
Wed, Jun 24th	vs TEX	Jacob deGrom (7-6)	#8	@ PIT	Braxton Ashcraft (9-4)	#25
Thu, Jun 25th				@ PIT	Bubba Chandler (3-8)	#123
Fri, Jun 26th	@ STL	Michael McGreevy (4-7)	#88	@ CLE	Joey Cantillo (8-5)	#74
Sat, Jun 27th	@ STL	Andre Pallante (10-6)	#133	@ CLE	Slade Cecconi (4-6)	#104
Sun, Jun 28th	@ STL	Kyle Leahy (7-4)	#119	@ CLE	Gavin Williams (10-5)	#26
Mon, Jun 29th	@ COL	Sean Sullivan (0-3)	#425	vs LAA	Ryan Johnson (2-4)	#175
Tue, Jun 30th	@ COL	Tanner Gordon (0-2)	#338	vs LAA	Jose Soriano (8-6)	#47
Thu, Jul 2nd	@ COL	Michael Lorenzen (3-9)	#428	vs LAA	Walbert Urena (6-7)	#258
Fri, Jul 3rd	@ ATH	Jack Perkins (2-5)	#108	vs TOR	Dylan Cease (6-5)	#9
Sat, Jul 4th	@ ATH	Aaron Civale (5-7)	#236	vs TOR	Shane Bieber (1-1)	#80
Sun, Jul 5th	@ ATH	Gage Jump (3-5)	#91	vs TOR	Trey Yesavage (4-5)	#82
Tue, Jul 7th	vs SEA	Bryan Woo (7-6)	#13	@ MIA	Max Meyer (9-1)	#61
Wed, Jul 8th	vs SEA	George Kirby (8-8)	#23	@ MIA	Tyler Phillips (2-5)	#271
Thu, Jul 9th	vs SEA	Bryce Miller (4-4)	#38	@ MIA	Janson Junk (4-6)	#106
Fri, Jul 10th	vs CLE	Parker Messick (8-5)	#41	@ TB	Nick Martinez (9-2)	#103
Sat, Jul 11th	vs CLE	Tanner Bibee (4-9)	#51	@ TB	Griffin Jax (5-7)	#60
Sun, Jul 12th	vs CLE	Joey Cantillo (8-5)	#74	@ TB	Ian Seymour (6-2)	#76
Fri, Jul 17th	@ MIL	Logan Henderson (3-1)	#58	vs SF	Landen Roupp (7-8)	#56
Sat, Jul 18th	@ MIL	Shane Drohan (5-3)	#85	vs SF	Logan Webb (5-7)	#15
Sun, Jul 19th	@ MIL	Robert Gasser (2-4)	#137	vs SF	Robbie Ray (8-6)	#87
Mon, Jul 20th	@ HOU	Ronel Blanco (0-0)	#145	vs CIN	Andrew Abbott (5-6)	#105
Tue, Jul 21st	@ HOU	Tatsuya Imai (6-4)	#129	vs CIN	Chase Burns (12-1)	#21
Wed, Jul 22nd	@ HOU	Peter Lambert (8-5)	#136	vs CIN	Brady Singer (4-9)	#148
Fri, Jul 24th	vs SD	German Marquez (4-2)	#377	@ TEX	MacKenzie Gore (6-8)	#35
Sat, Jul 25th	vs SD	JP Sears (2-3)	#167	@ TEX	Nathan Eovaldi (9-8)	#17
Sun, Jul 26th	vs SD	Walker Buehler (6-5)	#190	@ TEX	Jacob deGrom (7-6)	#8
Mon, Jul 27th	vs PHI	Zack Wheeler (10-2)	#5	@ TEX	Kumar Rocker (3-8)	#98
Tue, Jul 28th	vs PHI	Aaron Nola (3-7)	#52	@ LAD	Eric Lauer (4-5)	#296
Wed, Jul 29th	vs PHI	Jesus Luzardo (9-4)	#10	@ LAD	Justin Wrobleski (11-2)	#78
Thu, Jul 30th	@ NYM	Nolan McLean (7-6)	#32	@ LAD	Roki Sasaki (3-5)	#117
Fri, Jul 31st	@ NYM			vs MIN
Sat, Aug 1st	@ NYM			vs MIN
Sun, Aug 2nd	@ NYM			vs MIN
Tue, Aug 4th	@ ATL			vs DET
Wed, Aug 5th	@ ATL			vs DET
Thu, Aug 6th	@ ATL			vs DET
Fri, Aug 7th	vs LAA			vs TB
Sat, Aug 8th	vs LAA			vs TB
Sun, Aug 9th	vs LAA			vs TB
Tue, Aug 11th	vs PIT			@ NYY
Wed, Aug 12th	vs PIT			@ NYY
Thu, Aug 13th	vs PIT			@ NYY
Fri, Aug 14th	@ CIN			@ HOU
Sat, Aug 15th	@ CIN			@ HOU
Sun, Aug 16th	@ CIN			@ HOU
Tue, Aug 18th	@ PHI			@ MIL
Wed, Aug 19th	@ PHI			@ MIL
Thu, Aug 20th				@ MIL
Fri, Aug 21st	vs WSH			vs CHC
Sat, Aug 22nd	vs WSH			vs CHC
Sun, Aug 23rd	vs WSH			vs CHC
Mon, Aug 24th	vs BOS			vs PHI
Tue, Aug 25th	vs BOS			vs PHI
Wed, Aug 26th	vs BOS			vs PHI
Fri, Aug 28th	@ WSH			@ TOR
Sat, Aug 29th	@ WSH			@ TOR
Sun, Aug 30th	@ WSH			@ TOR
Mon, Aug 31st	@ WSH			@ BOS
Tue, Sep 1st	@ KC			@ BOS
Wed, Sep 2nd	@ KC			@ BOS
Thu, Sep 3rd	@ KC			vs ATH
Fri, Sep 4th	vs CHC			vs ATH
Sat, Sep 5th	vs CHC			vs ATH
Sun, Sep 6th	vs CHC			vs ATH
Tue, Sep 8th	vs NYM			vs TEX
Wed, Sep 9th	vs NYM			vs TEX
Thu, Sep 10th				vs TEX
Fri, Sep 11th	vs LAD			@ ATH
Sat, Sep 12th	vs LAD			@ ATH
Sun, Sep 13th	vs LAD			@ ATH
Mon, Sep 14th	@ ARI			@ LAA
Tue, Sep 15th	@ ARI			@ LAA
Wed, Sep 16th	@ ARI			@ LAA
Fri, Sep 18th	@ SD			@ COL
Sat, Sep 19th	@ SD			@ COL
Sun, Sep 20th	@ SD			@ COL
Tue, Sep 22nd	@ CHC			vs HOU
Wed, Sep 23rd	@ CHC			vs HOU
Thu, Sep 24th	@ CHC			vs LAA
Fri, Sep 25th	vs ATL			vs LAA
Sat, Sep 26th	vs ATL			vs LAA
Sun, Sep 27th	vs ATL			vs LAA
Thu, Apr 9th	vs CIN	Rhett Lowder (3-7)	#197
Thu, May 7th	vs BAL	Cade Povich (1-1)	#237
Thu, May 21st	vs ATL	Spencer Strider (4-2)	#208
Mon, Jun 15th	@ PHI	Zack Wheeler (10-2)	#5
Mon, Jun 22nd	vs TEX	Tyler Alexander (1-1)	#162
Wed, Jul 1st	@ COL	Kyle Freeland (2-9)	#240
Mon, Aug 17th	@ PHI
Mon, Sep 7th	vs NYM

Who Should I Trade?

Jhonathan Diaz for William Kempner (2026)

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