Who Should I Trade?

Jonathan Loaisiga for Riley O'Brien (2026)

Summary
Stats
Projections
News & Notes
Schedule

Who Should I Trade? Player Summaries
	Experts' Pick
	Riley O'Brien RP - STL	Jonathan Loaisiga RP - ARI
Expert Recommendation	100% Recommended by 6 of 6 experts	0% Recommended by 0 of 6 experts
Rankings

Rest of Season	# 70	# 316
VBR	# 315	# 487

Projections

Strikeouts	26	18
Wins	1	1
Saves	11	1
ERA	3.73	3.80
WHIP	1.39	1.33

Misc

Injury Alert	-	-

Expert Ranks

Scott Pianowski Yahoo! Sports	# 58	‐

Dalton Del Don The Deep Shot	# 72	‐

Chris Welsh FantasyPros	# 78	‐

Mike Maher BettingPros	# 76	‐

Kelly Kirby FantasyPros	# 121	# 266

Kevin Spinelli KevScores	# 96	# 347

Who Should I Trade? Player Statistics
	Riley O'Brien RP - STL	Jonathan Loaisiga RP - ARI
2026 Stats


Games Played	40	41

Games Started	0	0

Innings Pitched	40.1	38.0

Wins	3	2

Losses	3	2

Saves	25	1

Blown Saves	4	3

Holds	1	8

Hits Allowed	32	30

Earned Runs	15	9

Home Runs Allowed	2	1

Strikeouts	40	27

Walks	14	9

ERA	3.35	2.13

WHIP	1.14	1.03

Who Should I Trade? Player Projections
	Riley O'Brien RP - STL	Jonathan Loaisiga RP - ARI
2026 Projections


Games Played	28	26

Games Started	0	0

Innings Pitched	25.4	22.5

Wins	1	1

Losses	1	1

Saves	11	1

Blown Saves	0	0

Holds	2	5

Hits Allowed	23	22

Earned Runs	11	10

Home Runs Allowed	2	2

Strikeouts	26	18

Walks	11	7

ERA	3.73	3.80

WHIP	1.39	1.33

Who Should I Trade? Player Notes
	Riley O'Brien RP - STL	Jonathan Loaisiga RP - ARI
News
	Riley O'Brien allowed one hit and one walk while striking out one in a scoreless appearance to earn the save in a 5-4 win over the Diamondbacks. Chase Davis Sat, Jul 18th	Jonathan Loaisiga pitched around a single and a double in the ninth inning to earn his first save of the season as the Diamondbacks defeated the Tigers, 1-0, on Wednesday. David Leisering Thu, Apr 2nd
	Riley O'Brien struck out one batter while allowing no hits and one walk in a scoreless outing to earn the save in Saturday's 4-1 win over Atlanta. Chase Davis Sun, Jul 12th	The Diamondbacks selected the contract of RHP Jonathan Loaisiga. Ari Koslow Wed, Mar 25th
	Riley O'Brien struck out two batters in a scoreless outing to earn the save in Friday's 2-1 win over the Braves. Chase Davis Sat, Jul 11th	D-backs reliever Jonathan Loaisiga has made the Opening Day roster. Brenton Kemp Sun, Mar 22nd
	Riley O'Brien struck out one batter while allowing one walk over a scoreless frame to earn the save in Saturday's 3-0 win over the Cubs. Chase Davis Sun, Jul 5th	The Diamondbacks signed RHP Jonathan Loáisiga to a minor league contract. Ari Koslow Wed, Jan 14th
	Riley O'Brien allowed one hit in a scoreless frame to earn the save in Tuesday's 5-3 win over Atlanta. Chase Davis Wed, Jul 1st
Notes
There are no recent notes for these players

Who Should I Trade? Player Schedules
Date	Opp	Opp Pitcher	VBR	Opp	Opp Pitcher	VBR
	Riley O'Brien RP - STL			Jonathan Loaisiga RP - ARI
Thu, Mar 26th	vs TB	Drew Rasmussen (7-5)	#20	@ LAD	Yoshinobu Yamamoto (10-6)	#12
Fri, Mar 27th				@ LAD	Emmet Sheehan (4-6)	#43
Sat, Mar 28th	vs TB	Joe Boyle (0-1)	#167	@ LAD	Tyler Glasnow (3-0)	#63
Mon, Mar 30th	vs NYM	Clay Holmes (4-4)	#114	vs DET	Justin Verlander (0-1)	#182
Tue, Mar 31st	vs NYM	Kodai Senga (0-7)	#152	vs DET	Casey Mize (4-6)	#39
Wed, Apr 1st	vs NYM	Freddy Peralta (5-8)	#35	vs DET	Tarik Skubal (6-5)	#2
Thu, Apr 2nd				vs ATL	Reynaldo Lopez (4-2)	#77
Fri, Apr 3rd	@ DET	Framber Valdez (5-6)	#29	vs ATL	Grant Holmes (6-4)	#148
Sat, Apr 4th	@ DET	Jack Flaherty (3-8)	#54	vs ATL	Bryce Elder (5-6)	#123
Sun, Apr 5th	@ DET	Keider Montero (6-5)	#157	vs ATL	Martin Perez (6-6)	#239
Tue, Apr 7th	@ WSH	Cade Cavalli (6-4)	#68	@ NYM	Freddy Peralta (5-8)	#35
Wed, Apr 8th	@ WSH	Miles Mikolas (3-7)	#309	@ NYM	David Peterson (4-7)	#85
Thu, Apr 9th				@ NYM	Nolan McLean (7-6)	#31
Fri, Apr 10th	vs BOS	Connelly Early (7-5)	#143	@ PHI	Jesus Luzardo (9-4)	#11
Sat, Apr 11th	vs BOS	Ranger Suarez (4-3)	#24	@ PHI	Taijuan Walker (1-4)
Sun, Apr 12th	vs BOS	Brayan Bello (2-6)	#140	@ PHI	Zach Pop
Mon, Apr 13th	vs CLE	Gavin Williams (10-5)	#26	@ BAL	Dean Kremer (1-2)	#81
Tue, Apr 14th	vs CLE	Joey Cantillo (8-5)	#84	@ BAL	Trevor Rogers (6-7)	#78
Wed, Apr 15th	vs CLE	Slade Cecconi (4-6)	#112	@ BAL	Kyle Bradish (6-9)	#40
Fri, Apr 17th	@ HOU	Peter Lambert (8-5)	#162	vs TOR	Braydon Fisher (3-3)	#165
Sat, Apr 18th	@ HOU	Lance McCullers Jr. (2-3)	#188	vs TOR	Max Scherzer (1-4)	#144
Sun, Apr 19th	@ HOU	Mike Burrows (4-9)	#180	vs TOR	Kevin Gausman (4-8)	#23
Tue, Apr 21st	@ MIA	Chris Paddack (0-7)		vs CWS	Sean Burke (7-4)	#87
Wed, Apr 22nd	@ MIA	Janson Junk (4-5)	#110	vs CWS	Anthony Kay (6-4)	#168
Thu, Apr 23rd				vs CWS	Davis Martin (9-5)	#100
Sat, Apr 25th	vs SEA	Bryan Woo (7-6)	#13	vs SD	German Marquez (4-2)	#329
Sun, Apr 26th	vs SEA	Emerson Hancock (6-4)	#92	vs SD	Michael King (6-7)	#50
Tue, Apr 28th	@ PIT	Braxton Ashcraft (9-3)	#25	@ MIL	Chad Patrick (5-4)	#127
Wed, Apr 29th	@ PIT	Bubba Chandler (3-8)	#128	@ MIL	Brandon Sproat (3-4)	#124
Thu, Apr 30th	@ PIT	Paul Skenes (9-8)	#3	@ MIL	Brandon Woodruff (2-2)
Fri, May 1st	vs LAD	Emmet Sheehan (4-6)	#43	@ CHC	Colin Rea (7-6)	#190
Sat, May 2nd	vs LAD	Roki Sasaki (3-5)	#117	@ CHC	Shota Imanaga (6-8)	#30
Sun, May 3rd	vs LAD	Justin Wrobleski (10-2)	#82	@ CHC	Matthew Boyd (6-1)	#38
Tue, May 5th				vs PIT	Bubba Chandler (3-8)	#128
Wed, May 6th	vs MIL	Brandon Sproat (3-4)	#124	vs PIT	Paul Skenes (9-8)	#3
Thu, May 7th	@ SD	Michael King (6-7)	#50	vs PIT	Mitch Keller (6-7)	#111
Fri, May 8th	@ SD	Griffin Canning (1-8)	#145	vs NYM	Nolan McLean (7-6)	#31
Sat, May 9th	@ SD	Randy Vasquez (6-6)	#296	vs NYM	Clay Holmes (4-4)	#114
Sun, May 10th	@ SD	Walker Buehler (5-5)	#179	vs NYM	Huascar Brazoban (4-2)	#203
Mon, May 11th				@ TEX	Jakob Junis
Tue, May 12th	@ ATH	Jeffrey Springs (3-9)	#181	@ TEX	MacKenzie Gore (6-8)	#37
Wed, May 13th	@ ATH	J.T. Ginn (8-6)	#156	@ TEX	Kumar Rocker (2-8)	#102
Fri, May 15th	vs KC	Michael Wacha (5-7)	#71	@ COL	Kyle Freeland (2-8)	#275
Sat, May 16th	vs KC	Noah Cameron (5-8)	#76	@ COL	Tomoyuki Sugano (9-4)	#438
Sun, May 17th	vs KC	Stephen Kolek (4-3)	#174	@ COL	Michael Lorenzen (3-9)	#430
Mon, May 18th				vs SF	Robbie Ray (8-6)	#86
Tue, May 19th	vs PIT	Mitch Keller (6-7)	#111	vs SF	Landen Roupp (7-8)	#58
Wed, May 20th	vs PIT	Carmen Mlodzinski (6-3)	#121	vs SF	Tyler Mahle (2-8)	#89
Thu, May 21st	vs PIT	Braxton Ashcraft (9-3)	#25	vs COL	Zach Agnos
Fri, May 22nd				vs COL	Tomoyuki Sugano (9-4)	#438
Sat, May 23rd	@ CIN	Chase Petty (1-2)	#387	vs COL	Michael Lorenzen (3-9)	#430
Sun, May 24th				vs COL	Jose Quintana (2-3)	#435
Mon, May 25th	@ MIL	Jacob Misiorowski (10-4)	#6	@ SF	Landen Roupp (7-8)	#58
Tue, May 26th	@ MIL	Kyle Harrison (8-2)	#59	@ SF	Tyler Mahle (2-8)	#89
Wed, May 27th	@ MIL	Chad Patrick (5-4)	#127	@ SF	Trevor McDonald (3-7)	#172
Fri, May 29th	vs CHC	Shota Imanaga (6-8)	#30	@ SEA	George Kirby (7-8)	#18
Sat, May 30th	vs CHC	Ben Brown (4-2)	#91	@ SEA	Bryan Woo (7-6)	#13
Sun, May 31st	vs CHC	Jordan Wicks (0-2)	#231	@ SEA	Bryce Miller (4-4)	#34
Mon, Jun 1st	vs TEX	Jacob deGrom (7-5)	#9	vs LAD	Emmet Sheehan (4-6)	#43
Tue, Jun 2nd	vs TEX	Nathan Eovaldi (9-8)	#17	vs LAD	Eric Lauer (4-5)	#355
Wed, Jun 3rd	vs TEX	MacKenzie Gore (6-8)	#37	vs LAD	Shohei Ohtani (8-2)	#1
Thu, Jun 4th				vs LAD	Justin Wrobleski (10-2)	#82
Fri, Jun 5th	vs CIN	Brady Singer (4-9)	#158	vs WSH	Foster Griffin (11-2)	#62
Sat, Jun 6th	vs CIN	Nick Lodolo (3-2)	#101	vs WSH	Zack Littell (7-7)	#164
Sun, Jun 7th	vs CIN	Rhett Lowder (3-7)	#208	vs WSH	Cade Cavalli (6-4)	#68
Tue, Jun 9th	@ NYM	Freddy Peralta (5-8)	#35	@ MIA	Max Meyer (9-1)	#42
Wed, Jun 10th	@ NYM	Austin Warren		@ MIA	Ryan Gusto (0-2)	#178
Thu, Jun 11th	@ NYM	Christian Scott (3-1)	#66	@ MIA	Tyler Phillips (2-4)	#273
Fri, Jun 12th	@ MIN	Joe Ryan (6-5)	#14	@ CIN	Nick Lodolo (3-2)	#101
Sat, Jun 13th	@ MIN	Connor Prielipp (2-5)	#129	@ CIN	Rhett Lowder (3-7)	#208
Sun, Jun 14th	@ MIN	Taj Bradley (9-4)	#48	@ CIN	Andrew Abbott (5-5)	#90
Mon, Jun 15th	vs SD	Wandy Peralta (1-1)	#213	vs LAA	Walbert Urena (5-7)	#267
Tue, Jun 16th	vs SD	Michael King (6-7)	#50	vs LAA	Reid Detmers (3-6)	#36
Wed, Jun 17th	vs SD	Bradgley Rodriguez (2-2)	#147	vs LAA	Sam Aldegheri (3-4)	#431
Fri, Jun 19th	@ KC	Seth Lugo (3-6)	#122	vs MIN	Connor Prielipp (2-5)	#129
Sat, Jun 20th				vs MIN	Taj Bradley (9-4)	#48
Sun, Jun 21st	@ KC	Stephen Kolek (4-3)	#174	vs MIN	Mike Paredes (0-2)	#250
Mon, Jun 22nd	vs ARI	Merrill Kelly (7-8)	#118	@ STL	Andre Pallante (10-6)	#137
Tue, Jun 23rd	vs ARI	Eduardo Rodriguez (8-3)	#113	@ STL	Kyle Leahy (7-4)	#130
Wed, Jun 24th	vs ARI	Mitch Bratt (0-0)	#199	@ STL	Matthew Liberatore (5-6)	#120
Fri, Jun 26th	vs MIA	Max Meyer (9-1)	#42	@ TB	Nick Martinez (8-2)	#88
Sat, Jun 27th	vs MIA	Ryan Gusto (0-2)	#178	@ TB	Cole Sulser
Sun, Jun 28th	vs MIA	Tyler Phillips (2-4)	#273	@ TB	Drew Rasmussen (7-5)	#20
Mon, Jun 29th				vs SF	Tyler Mahle (2-8)	#89
Tue, Jun 30th	@ ATL	Martin Perez (6-6)	#239	vs SF	Landen Roupp (7-8)	#58
Wed, Jul 1st	@ ATL	Reynaldo Lopez (4-2)	#77	vs SF	Trevor McDonald (3-7)	#172
Fri, Jul 3rd	@ CHC	David Peterson (4-7)	#85	vs MIL	Kyle Harrison (8-2)	#59
Sat, Jul 4th	@ CHC	Shota Imanaga (6-8)	#30	vs MIL	Brandon Woodruff (2-2)
Sun, Jul 5th	@ CHC	Javier Assad (6-1)	#192	vs MIL	Brandon Sproat (3-4)	#124
Mon, Jul 6th	vs MIL	Shane Drohan (5-3)	#93	@ SD	Walker Buehler (5-5)	#179
Tue, Jul 7th	vs MIL	Robert Gasser (2-4)	#136	@ SD	German Marquez (4-2)	#329
Wed, Jul 8th	vs MIL	Kyle Harrison (8-2)	#59	@ SD	Michael King (6-7)	#50
Thu, Jul 9th	vs MIL	Logan Henderson (3-1)	#56	@ SD	Griffin Canning (1-8)	#145
Fri, Jul 10th	vs ATL	Chris Sale (10-6)	#7	@ LAD	Kyle Hurt
Sat, Jul 11th	vs ATL	Reynaldo Lopez (4-2)	#77	@ LAD	Yoshinobu Yamamoto (10-6)	#12
Sun, Jul 12th	vs ATL	Danny Young		@ LAD	Emmet Sheehan (4-6)	#43
Fri, Jul 17th	@ ARI	Merrill Kelly (7-8)	#118	vs STL	Michael McGreevy (4-7)	#80
Sat, Jul 18th	@ ARI	Brandon Pfaadt (4-1)	#79	vs STL	Dustin May (5-7)	#52
Sun, Jul 19th	@ ARI	Eduardo Rodriguez (8-3)	#113	vs STL	Andre Pallante (10-6)	#137
Mon, Jul 20th	@ LAA	Jose Soriano (8-6)	#47	vs ATH	Jeffrey Springs (3-9)	#181
Tue, Jul 21st	@ LAA	Walbert Urena (5-7)	#267	vs ATH	Jack Perkins (2-5)	#108
Wed, Jul 22nd	@ LAA	Reid Detmers (3-6)	#36	vs ATH	Gage Jump (3-5)	#99
Thu, Jul 23rd	vs ARI	Brandon Pfaadt (4-1)	#79	@ STL	Dustin May (5-7)	#52
Fri, Jul 24th	vs CIN	Rhett Lowder (3-7)	#208	@ WSH	Zack Littell (7-7)	#164
Sat, Jul 25th	vs CIN	Hunter Greene (2-1)	#16	@ WSH	Foster Griffin (11-2)	#62
Sun, Jul 26th	vs CIN	Andrew Abbott (5-5)	#90	@ WSH	Andrew Alvarez (2-3)	#149
Mon, Jul 27th	vs CHC	David Peterson (4-7)	#85	@ PIT	Bubba Chandler (3-8)	#128
Tue, Jul 28th	vs CHC	Colin Rea (7-6)	#190	@ PIT	Mitch Keller (6-7)	#111
Wed, Jul 29th	vs CHC	Matthew Boyd (6-1)	#38	@ PIT	Jared Jones (2-1)	#60
Fri, Jul 31st	@ TOR			@ CLE
Sat, Aug 1st	@ TOR			@ CLE
Sun, Aug 2nd	@ TOR			@ CLE
Mon, Aug 3rd	@ NYY			vs SD
Tue, Aug 4th	@ NYY			vs SD
Wed, Aug 5th	@ NYY			vs SD
Thu, Aug 6th				vs SD
Fri, Aug 7th	vs COL			vs LAD
Sat, Aug 8th	vs COL			vs LAD
Sun, Aug 9th	vs COL			vs LAD
Mon, Aug 10th	vs PHI			vs COL
Tue, Aug 11th	vs PHI			vs COL
Wed, Aug 12th	vs PHI			vs COL
Fri, Aug 14th	@ CHC			@ ATL
Sat, Aug 15th	@ CHC			@ ATL
Sun, Aug 16th	@ CHC			@ ATL
Mon, Aug 17th	@ CIN			@ BOS
Tue, Aug 18th	@ CIN			@ BOS
Wed, Aug 19th	@ CIN			@ BOS
Fri, Aug 21st	@ PHI			vs CIN
Sat, Aug 22nd	@ PHI			vs CIN
Sun, Aug 23rd	@ PHI			vs CIN
Mon, Aug 24th				vs CHC
Tue, Aug 25th	vs BAL			vs CHC
Wed, Aug 26th	vs BAL			vs CHC
Thu, Aug 27th	vs BAL			@ SF
Fri, Aug 28th	vs PIT			@ SF
Sat, Aug 29th	vs PIT			@ SF
Mon, Aug 31st				vs PHI
Tue, Sep 1st	@ LAD			vs PHI
Wed, Sep 2nd	@ LAD			vs PHI
Fri, Sep 4th	@ COL			@ HOU
Sat, Sep 5th	@ COL			@ HOU
Sun, Sep 6th	@ COL			@ HOU
Mon, Sep 7th	@ SF			@ KC
Tue, Sep 8th	@ SF			@ KC
Wed, Sep 9th	@ SF			@ KC
Fri, Sep 11th	vs CWS			vs TEX
Sat, Sep 12th	vs CWS			vs TEX
Sun, Sep 13th	vs CWS			vs TEX
Mon, Sep 14th	vs SF			vs MIA
Tue, Sep 15th	vs SF			vs MIA
Wed, Sep 16th	vs SF			vs MIA
Fri, Sep 18th	vs WSH			vs NYY
Sat, Sep 19th	vs WSH			vs NYY
Sun, Sep 20th	vs WSH			vs NYY
Tue, Sep 22nd	@ PIT			@ COL
Wed, Sep 23rd	@ PIT			@ COL
Thu, Sep 24th	@ PIT			@ COL
Fri, Sep 25th	@ MIL			@ SD
Sat, Sep 26th	@ MIL			@ SD
Sun, Sep 27th	@ MIL			@ SD
Sun, Mar 29th	vs TB	Steven Matz (4-4)	#196
Mon, Apr 6th	@ WSH	Zack Littell (7-7)	#164
Mon, Apr 20th	@ MIA	Max Meyer (9-1)	#42
Fri, Apr 24th	vs SEA	George Kirby (7-8)	#18
Mon, Apr 27th	@ PIT	Mason Montgomery (2-3)	#116
Mon, May 4th	vs MIL	Chad Patrick (5-4)	#127
Thu, May 14th	@ ATH	Jacob Lopez (4-4)	#202
Thu, Jun 18th	@ KC	Noah Cameron (5-8)	#76
Thu, Jul 2nd	@ ATL	Hurston Waldrep (0-1)	#226
Thu, Jul 30th	vs CHC
Thu, Aug 20th	@ CIN
Sun, Aug 30th	vs PIT
Thu, Sep 3rd	@ LAD

Who Should I Trade?

Jonathan Loaisiga for Riley O'Brien (2026)

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