Biographical

Ronald Bolaños P
Scouting Report
Scouted by Will Siskel (Aug 19, 2017)
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2019 Projections (Preseason PECOTA - seasonal age 22)

IP	ERA	WHIP	SO	W	L	SV	WARP
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Birth Date	8-23-1996
Height	6' 2"
Weight	230 lbs

Age	28 years, 7 months, 11 days
Bats	R
Throws	R

: 2015
: 2016
: 2017
: 2018
: -0.62019
proj

WARP Summary

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MLB Statistics

Historical (past-seasons) WARP is now based on DRA..
cFIP and DRA are not available on a by-team basis and display as zeroes(0). See TOT line for season totals of these stats.
Multiple stints are are currently shown —Click to hide.

YEAR	Team	Lg	G	GS	IP	W	L	SV	H	BB	SO	HR	PPF	H/9	BB/9	HR/9	K/9	GB%	BABIP	WHIP	FIP	ERA	cFIP	DRA	DRA-	WARP
2019	SDN	MLB	5	3	19.7	0	2	0	17	12	19	3	97	7.8	5.5	1.4	8.7	41%	.264	1.47	5.20	5.95	113	6.03	123.7	-0.1
Career		MLB	5	3	19.7	0	2	0	17	12	19	3	97	7.8	5.5	1.4	8.7	41%	.264	1.47	5.20	5.95	113	6.03	123.7	-0.1

Statistics for All Levels

'opp' stats - Quality of opponents faced - have been moved and are available only as OPP_QUAL in the Statistics reports now.
Minor league stats are currently shown —Click to hide.

YEAR	Team	Lg	LG	G	GS	IP	W	L	H	BB	SO	HR	PPF	H/9	BB/9	HR/9	K/9	GB%	BABIP	WHIP	FIP	ERA	cFIP	DRA	DRA-
2017	FTW	A	MID	16	11	69.3	5	2	65	34	51	3	103	8.4	4.4	0.4	6.6	46%	.301	1.43	4.15	4.41	112	5.38	114.5
2018	LEL	A+	CAL	25	23	125.0	6	9	138	50	118	13	103	9.9	3.6	0.9	8.5	44%	.341	1.50	4.65	5.11	107	5.11	108.1
2019	SDN	MLB	NL	5	3	19.7	0	2	17	12	19	3	97	7.8	5.5	1.4	8.7	41%	.264	1.47	5.20	5.95	113	6.03	123.7
2019	LEL	A+	CAL	10	10	53.7	5	2	37	23	54	4	94	6.2	3.9	0.7	9.1	50%	.244	1.12	4.07	2.85	102	3.37	69.3
2019	AMA	AA	TEX	15	13	76.7	8	5	71	30	88	7	113	8.3	3.5	0.8	10.3	48%	.335	1.32	3.90	4.23	95	4.88	100.4

Plate Discipline

YEAR	Pits	Zone%	Swing%	Contact%	Z-Swing%	O-Swing%	Z-Contact%	O-Contact%	SwStr%
2019	317	0.4700	0.3975	0.7698	0.5839	0.2321	0.8621	0.5641	0.2302
Career	317	0.4700	0.3975	0.7698	0.5839	0.2321	0.8621	0.5641	0.2302

Injury History — No longer being updated

Last Update: 12/31/2014 23:59 ET

Date On	Date Off	Transaction	Days	Games	Side	Body Part	Injury	Severity	Surgery Date	Reaggravation

Compensation

Year	Team	Salary
2021	KCA	$
2020	SDN	$
2019	SDN	$

Service Time	Agent	Contract Status
0 y 159 d	Magnus Sports	1 year (2022)

Details
1 year (2022). Re-signed by Kansas City 3/22. DFA by Kansas City 6/27/22. Sent outright to Triple-A 7/4/22. 1 year (2021). Re-signed by Kansas City 3/21. 1 year (2020). Re-signed by San Diego 3/20. Acquired by Kansas City in trade from San Diego 7/16/20. 1 year (2019). Contract selected by San Diego 9/2/19. Signed by San Diego 8/4/16 as a free agent from Cuba. $2.25M signing bonus.

2019 Preseason Forecast

Last Update: 1/27/2017 12:35 ET

PCT	L	G	GS	IP	H	BB	SO	HR	BABIP	WHIP	ERA	DRA	VORP	WARP
90^o	12	23	23	117.4	104	52	92	15	.264	1.33	4.18	4.41	-15.1	-1.6
80^o	12	21	21	109.6	105	53	86	15	.279	1.44	4.61	4.87	-19.5	-2.1
70^o	12	20	20	104.1	105	53	81	15	.291	1.52	4.93	5.21	-22.2	-2.4
60^o	11.9	19	19	99.5	106	53	78	15	.300	1.59	5.21	5.51	-24.4	-2.7
50^o	11.9	18	18	95.3	106	53	75	15	.309	1.66	5.48	5.79	-26.2	-2.8
40^o	11.8	18	18	91.2	105	53	71	15	.318	1.74	5.75	6.08	-27.9	-3.0
30^o	11.7	17	17	86.9	105	53	68	15	.328	1.82	6.05	6.39	-29.4	-3.2
20^o	11.5	16	16	82.0	104	53	64	15	.339	1.91	6.41	6.77	-31.1	-3.4
10^o	11.3	15	15	75.4	103	52	59	15	.355	2.05	6.92	7.31	-32.9	-3.6
Weighted Mean	11.8	18	18	95.0	104	52	74	15	.307	1.65	5.44	5.75	-25.7	-2.8

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BP Annual Player Comments

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PITCHf/x Pitcher Profile

A Collaboration between BrooksBaseball.net and Baseball Prospectus - Pitch classifications provided by Pitch Info LLC

Although he has not thrown an MLB pitch in 2025, Ronald Bolaños threw 2,184 pitches that were tracked by the PITCHf/x system between 2019 and 2023, all of them occuring in Spring Training. In 2023, he relied primarily on his Fourseam Fastball (93mph), Sinker (93mph) and Slider (85mph), also mixing in a Curve (77mph) and Change (88mph). He also rarely threw a Slow Curve (69mph).

Baseball Prospectus