Ronald Bolaños
P | Bats/Throws: R/R | 6' 2" 230LBS | Age: 27
W L ERA G GS SV IP SO WHIP
2020 0 2 12.27 2 2 0 3.2 2 3.00
2021 0 0 1.42 3 0 0 6.1 10 0.95
2022 0 0 4.42 8 0 0 18.1 12 1.75
4 Seasons 0 4 5.25 18 5 0 48 43 1.63
G W-L ERA IP SO WHIP
2020 2 0-2 12.27 3.2 2 3.00
2021 3 0-0 1.42 6.1 10 0.95
2022 8 0-0 4.42 18.1 12 1.75
4 Seasons 18 0-4 5.25 48 43 1.63
MLB Percentile Rankings
Pitch Distribution

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Statcast Statistics

Season Age Pitches Batted
Balls		 Barrels Barrel % Barrel/PA Exit
Velocity		 Max EV Launch
Angle		 Sweet
Spot %		 XBA XSLG WOBA XWOBA XWOBACON HardHit% K% BB% ERA xERA
2019 22 346 56 3 5.4 3.4 90.0 112.5 10.9 37.5 .289 .444 .338 .365 .414 48.2 21.6 13.6 5.95 6.12
2020 23 73 15 2 13.3 9.5 92.4 106.6 5.0 33.3 .390 .747 .575 .525 .548 40.0 9.5 14.3 12.27 15.70
2021 24 106 13 0 0.0 0.0 81.6 111.1 18.1 15.4 .141 .163 .196 .180 .239 15.4 40.0 8.0 1.42 1.39
2022 25 332 60 4 6.7 4.6 91.0 110.6 8.8 28.3 .287 .437 .368 .374 .373 43.3 13.8 13.8 4.42 6.13
Player 857 144 9 6.3 4.1 89.9 112.5 10.1 31.3 .278 .432 .356 .362 .394 42.4 19.5 13.1
MLB 6.9 4.7 88.4 122.4 12.2 33.1 .245 .406 .316 .315 .369 36.3 22.1 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Bolanos relies on 5 pitches.
Sinker
(33.4%) ,
Slider
(30.1%) ,
4-Seam Fastball
(21.1%) ,
Curveball
(10.5%) ,
Changeup
(4.8%) ,


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Pitch Tracking



Batted Ball Profile

Season GB % FB % LD % PU % Pull % Straight % Oppo % Weak % Topped % Under % Flare/Burner % Solid % Barrel % Barrel/PA
2019 41.1 25.0 30.4 3.6 50.0 26.8 23.2 1.8 32.1 23.2 28.6 7.1 5.4 3.4
2020 53.3 26.7 20.0 0.0 20.0 66.7 13.3 0.0 33.3 6.7 40.0 0.0 13.3 9.5
2021 38.5 30.8 15.4 15.4 30.8 38.5 30.8 0.0 30.8 46.2 23.1 0.0 0.0 0.0
2022 50.0 25.0 23.3 1.7 38.3 38.3 23.3 1.7 36.7 21.7 28.3 5.0 6.7 4.6
Player 45.8 25.7 25.0 3.5 40.3 36.8 22.9 1.4 34.0 22.9 29.2 4.9 6.3 4.1
MLB 44.6 23.5 24.9 7.0 37.0 37.6 25.3 3.9 32.8 24.7 24.4 5.8 6.9 4.7
! Note: All figures in this table cover the period 2015-present.

Pitch Movement

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How this works: Every pitch is affected by the forces of gravity, which means that every pitch drops on its way from the mound to the plate. These numbers are reported with gravity, which makes them larger and different than other pitch movement numbers you may have seen. Since gravity requires time, and slower pitches aren’t ‘better’ just because they have more time to move, the movement of a pitch is compared to ‘average’ movement by comparing it to other MLB pitch types within +/- 2 MPH and from within +/- 0.5 feet of extension and release.
Vertical Movement (inches) Horizontal Movement (inches)
Year Pitch Team Hand # MPH Inches of Drop vs Avg % vs Avg Inches of Break vs Avg % Break vs Avg
2022 4-Seamer KC R 70 93.0 18.3 -3.4 -23 6.2 -0.3 -4
2022 Sinker KC R 111 93.1 21.3 0.3 1 10.8 -3.5 -24
2022 Changeup KC R 16 87.1 27.4 -1.8 -6 10.7 -3.3 -24
2022 Slider KC R 100 84.1 37.9 0.7 2 7.8 2.1 36
2022 Curveball KC R 35 77.0 52.4 -5.2 -9 13.8 4.4 46
2021 Slider KC R 30 86.3 33.2 -1.2 -3 5.0 0.5 11
2021 4-Seamer KC R 19 95.2 15.5 -1.9 -14 8.9 1.9 27
2021 Curveball KC R 17 79.8 43.6 -9.9 -19 11.9 3.5 43
2021 Changeup KC R 4 90.2 21.4 -5.0 -19 11.2 -2.5 -18
2021 Sinker KC R 36 95.0 19.6 -0.1 0 13.3 -1.4 -9
2020 Sinker KC R 14 94.4 21.1 0.8 4 13.4 -1.2 -8
2020 Changeup KC R 2 87.8 28.8 0.1 0 6.0 -7.3 -55
2020 4-Seamer KC R 29 95.5 16.2 -2.3 -16 8.6 1.3 18
2020 Curveball KC R 13 77.2 48.5 -8.5 -15 12.6 2.9 29
2020 Slider KC R 15 86.3 31.9 -2.8 -8 4.1 0.0 0
2019 Sinker SD R 28 94.1 18.7 -2.1 -10 12.6 -1.9 -13
2019 4-Seamer SD R 189 94.3 15.8 -0.8 -5 7.9 0.6 8
2019 Slider SD R 38 83.0 37.4 -1.4 -4 6.5 1.0 18
2019 Curveball SD R 71 76.4 51.9 -6.9 -12 14.7 4.4 43
2019 Changeup SD R 18 86.2 27.8 -1.3 -5 9.4 -4.2 -31
! Note: Years are in reverse order.
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Run Values by Pitch Type

Year Pitch Type Team RV/100 Run Value Pitches % PA BA SLG wOBA Whiff% K% PutAway % xBA xSLG xwOBA Hard Hit %
2022 Sinker -2.0 -2 111 33.4 37 .321 .357 .399 13.0 2.7 7.1 .334 .405 .417 44.4
2022 Slider -0.2 0 100 30.1 22 .211 .526 .295 44.2 36.4 38.1 .178 .409 .265 30.8
2022 4-Seamer 0.7 1 70 21.1 18 .267 .333 .336 17.2 5.6 5.9 .318 .481 .405 57.1
2022 Curveball 0.1 0 35 10.5 7 .333 .667 .457 15.4 28.6 22.2 .240 .492 .366 50.0
2022 Changeup -4.6 -1 16 4.8 2 .500 1.000 .625 0.0 0.0 -- .563 .653 .544 0.0
2021 Sinker 4.9 2 36 34.0 12 .182 .182 .208 35.0 41.7 45.5 .110 .130 .157 0.0
2021 Slider 3.2 1 30 28.3 6 .167 .167 .150 60.0 50.0 37.5 .257 .297 .246 33.3
2021 4-Seamer -1.4 0 19 17.9 4 .333 .333 .400 20.0 25.0 16.7 .158 .164 .282 50.0
2021 Curveball 2.6 0 17 16.0 2 .000 .000 .000 20.0 50.0 33.3 .013 .015 .012 0.0
2021 Changeup 1.2 0 4 3.8 1 .000 .000 .000 0.0 0.0 -- .003 .005 .003 0.0
2020 4-Seamer -10.4 -3 29 39.7 11 .444 .778 .610 7.1 9.1 20.0 .411 .834 .559 62.5
2020 Slider -17.5 -3 15 20.5 1 1.000 4.000 2.000 16.7 0.0 0.0 .727 2.625 1.342 100.0
2020 Sinker -3.1 0 14 19.2 5 .333 .333 .640 20.0 0.0 0.0 .256 .294 .427 0.0
2020 Curveball 0.1 0 13 17.8 4 .500 .500 .450 28.6 25.0 20.0 .363 .444 .350 0.0
2020 Changeup -4.0 0 2 2.7 -- -- -- -- -- -- -- -- -- --
2019 4-Seamer -0.4 -1 189 54.6 52 .256 .488 .406 12.3 7.7 11.1 .321 .543 .421 51.3
2019 Curveball 1.0 1 71 20.5 20 .158 .368 .243 55.2 60.0 41.4 .162 .226 .192 28.6
2019 Slider -2.5 -1 38 11.0 8 .400 .800 .488 23.5 12.5 16.7 .344 .406 .401 20.0
2019 Sinker 5.5 2 28 8.1 7 .167 .333 .279 25.0 28.6 33.3 .325 .384 .366 75.0
2019 Changeup -3.0 -1 18 5.2 -- -- -- 50.0 -- 0.0 -- -- -- --
! Note: Years are in reverse order.
! Note: To better align with other values, positive numbers (red) are good, and negative numbers (blue) are poor.
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Spin Direction

Year Pitch Type Pitches MPH Active Spin % Total Movement (In.) Spin-Based Observed Deviation
2022 Changeup 16 87.1 91 13.6 1:00 2:00 -60
2022 Curveball 35 77.0 69 17.2 7:30 8:00 -30
2022 4-Seam Fastball 70 93.0 74 14.2 12:30 1:00 -30
2022 Sinker 110 93.1 78 14.6 12:30 1:45 -75
2022 Slider 100 84.1 41 8.8 9:00 8:45 15
2021 Curveball 17 79.8 63 13.1 8:00 8:45 -45
2021 4-Seam Fastball 19 95.2 82 16.7 12:45 1:15 -30
2021 Sinker 34 95.0 84 16.8 12:45 1:45 -60
2021 Slider 30 86.3 42 6.7 9:30 10:00 -30
2020 Curveball 12 77.9 58 14.0 8:00 8:30 -30
2020 4-Seam Fastball 26 95.6 89 15.7 1:00 1:15 -15
2020 Sinker 11 94.5 89 16.1 1:00 2:00 -60
2020 Slider 14 86.3 33 5.9 9:30 10:15 -45
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! Note: This table is showing data from the PITCHER perspective.
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Swing/Take

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2019 88 346 6 0 -3 -3 0
2021 25 106 1 3 -1 0 3
2022 86 332 0 2 -2 -2 -3
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Plate Discipline

Season Pitches Zone % Zone Swing % Zone Contact % Chase % Chase Contact % Edge % 1st Pitch Strike % Swing % Whiff % Meatball % Meatball Swing %
2019 346 46.5 65.2 82.9 20.0 54.1 43.4 48.9 41.0 23.9 7.5 76.9
2020 73 53.4 71.8 82.1 11.8 100.0 41.1 42.9 43.8 15.6 5.5 100.0
2021 106 43.4 65.2 76.7 35.0 42.9 44.3 44.0 48.1 37.3 7.5 87.5
2022 332 43.7 63.4 87.0 23.0 53.5 45.8 50.6 40.7 23.7 6.0 90.0
Player 857 45.6 65.2 83.5 22.5 53.3 44.2 48.4 42.0 25.0 6.8 84.5
MLB 48.6 67.0 82.0 28.5 58.0 42.6 60.9 47.1 24.8 7.3 76.1
! Note: All figures in this table cover the period 2015-present.

Percentile Rankings

Year xwOBA /
xERA 		xBA xSLG xISO xOBP Brl Brl% EV Hard
Hit% 		K% BB% Whiff% Chase
Rate 		FB
Velo 		FB
Spin 		CB
Spin 		Extension
2019 67 47 70 78
2021 76 47 72
2022 36 42 69
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Expected Home Runs

Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2019 22.8 3 2.2 1 1 1 1 33.3
2020 23.6 2 1.6 0 0 2 0 0.0
2022 21.3 2 2.1 0 1 2 0 0.0
Player 22.6 7 5.9 1 2 5 1 14.3

Expected Home Runs by Park

Year HR
2019 3 2 2 2 3 3 2 2 2 1 2 3 2 2 2 2 1 2 2 3 2 2 3 2 2 2 2 3 2 3 2
2020 2 2 1 2 1 2 2 2 0 2 1 1 2 2 2 1 2 2 2 2 2 1 2 2 2 2 1 1 2 2 0
2022 2 1 2 2 2 2 2 2 2 2 2 2 3 2 2 3 2 2 2 2 3 2 3 3 2 2 2 2 3 2 1
Player 7 5 5 6 6 7 6 6 4 5 5 6 7 6 6 6 5 6 6 7 7 5 8 7 6 6 5 6 7 7 3
! Note: This tells how many of this player's home runs would have been out of other stadiums. This accounts for different wall heights, distances and environmental effects. For these purposes, the 2020 Blue Jays home field was still Rogers Centre, not Sahlen Field.
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Year to Year Changes

Metric 2019 2020 +/-   2021 +/-   2022 +/-  
Fastball Velocity 94.2 95.2 1.0 ↑ 95.1 -0.1 ↓ 93.1 -2.0 ↓
Offspeed Velocity 86.2 87.8 1.6 ↑ 90.2 2.4 ↑ 87.1 -3.1 ↓
Breaking Velocity 78.5 82.1 3.6 ↑ 83.9 1.8 ↑ 82.3 -1.6 ↓
Exit Velocity 90.0 92.4 2.4 ↑ 81.6 -10.8 ↓ 91.0 9.4 ↑
Launch Angle 10.9 5.0 -5.9 ↓ 18.1 13.1 ↑ 8.8 -9.3 ↓
Barrel % 5.4 13.3 7.9 ↑ 0.0 -13.3 ↓ 6.7 6.7 ↑
Hard Hit % 48.2 40.0 -8.2 ↓ 15.4 -24.6 ↓ 43.3 27.9 ↑
Sweet Spot % 37.5 33.3 -4.2 ↓ 15.4 -17.9 ↓ 28.3 12.9 ↑
xBA .289 .390 0.101 ↑ .141 -0.249 ↓ .287 0.146 ↑
BA .230 .471 0.241 ↑ .174 -0.297 ↓ .286 0.112 ↑
xwOBA .365 .525 0.160 ↑ .180 -0.345 ↓ .374 0.194 ↑
wOBA .338 .575 0.237 ↑ .196 -0.379 ↓ .368 0.172 ↑
xSLG .444 .747 0.303 ↑ .163 -0.584 ↓ .437 0.274 ↑
SLG .459 .824 0.365 ↑ .174 -0.650 ↓ .443 0.269 ↑
K% 21.6 9.5 -12.1 ↓ 40.0 30.5 ↑ 13.8 -26.2 ↓
BB% 13.6 14.3 0.7 ↑ 8.0 -6.3 ↓ 13.8 5.8 ↑
Swing % 41.0 43.8 2.8 ↑ 48.1 4.3 ↑ 40.7 -7.4 ↓
Whiff% 23.9 15.6 -8.3 ↓ 37.3 21.7 ↑ 23.7 -13.6 ↓
In Zone % 46.5 53.4 6.9 ↑ 43.4 -10.0 ↓ 43.7 0.3 ↑
Out of Zone % 53.5 46.6 -6.9 ↓ 56.6 10.0 ↑ 56.3 -0.3 ↓
Out of Zone Swing % 20.0 11.8 -8.2 ↓ 35.0 23.2 ↑ 23.0 -12.0 ↓
First Pitch Swing % 18.2 33.3 15.1 ↑ 20.0 -13.3 ↓ 23.0 3.0 ↑
First Pitch Strike % 48.9 42.9 -6.0 ↓ 44.0 1.1 ↑ 50.6 6.6 ↑
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2019 Shifts 88 .338 40 8 20.0 48 28 58.3
2020 Shifts 21 .575 11 4 36.4 10 6 60.0
2021 Shifts 25 .196 15 2 13.3 10 8 80.0
2022 Shifts 86 .368 55 8 14.5 31 22 71.0
! Note: Shifts are through the 2022 season, Shaded starting from the 2023 season, Shift: three or more infielders are on the same side of second base, Shade: positioned outside of their typical responsible slices of the field.
Learn more about how positioning is defined here

Pitch Tempo

Bases EmptyRunners On Base
SeasonTeamPitchesTempoFast %Slow %PitchesTempoFast %Slow %
2019 99 15.2 45.5% 0.0% 74 20.3 5.4% 5.4%
2020 14 19.4 7.1% 0.0% 16 22.5 0.0% 6.3%
2021 26 20.2 3.8% 0.0% 23 26.7 0.0% 13.0%
2022 96 18.8 13.5% 2.1% 70 23.7 1.4% 17.1%
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Pitch Distribution

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