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Eduardo Rivera

#99 - Relief Pitcher

Boston Red Sox

Bats / Throws Left / Left
Date of Birth 6/13/2003 (22)
Height, Weight 6'7", 237 lb
Hometown San Juan, PRI

2026 Season Stats

MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
0 3.1 0.00 0.30 30.0% 0.0%
91st 1
Sv
300th 9.0
IP
1st 5.71
ERA
1st 1.59
WHIP
60th 21.9%
K%
1st 11.4%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
95.1 19.5% 36.6% 48.8% 0.0% 5.29 1.78
117th 94.2
FB MPH
17th 11.9%
SwStr%
15th 28.4%
CSW%
203rd 49.5%
Str-ICR
1st 4.1%
MTK%
21st 4.96
PLV
13th 3.48
PLA

Articles

4/23/2026Fantasy Baseball Relief Pitcher Roundup: 4/22Rick Graham

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Eduardo Rivera Overview

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L Sv Hld ERA WHIP xERA FIP xFIP PLA K% BB% H/9 HR/9 BABIP HR/FB% LOB% ICR GB% SwStr% CSW% IPR PLV
2026 BOS 1 0 3.1 0-0 0 0 0.00 0.30 0.56 1.21 1.92 1.78 30.0% 0.0% 2.7 0.00 .143 0.0% 100.0% 42.9% 57.1% 19.5% 36.6% 0.66 5.29
RP MLB Percentile 0 0 13 0-38 0 0 92 100 99 96 95 96 83 95 97 64 94 67 89 29 83 95 96 85 93
RP MLB AVG 7 0 9.0 0-1 1 1 5.71 1.59 4.86 5.33 4.78 3.48 21.9% 11.4% 9.5 1.29 .307 19.3% 71.7% 38.4% 43.8% 11.9% 28.4% 0.48 4.96
Career 1 0 3.1 0-0 0 0 0.00 0.30 0.56 1.34 2.01 1.78 30.0% 0.0% 2.7 0.00 .143 0.0% 100.0% 42.9% 57.1% 19.5% 36.6% 0.66 5.29

Eduardo Rivera Repertoire

2026 All
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Eduardo Rivera Game Log

Eduardo Rivera Standard

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Year Team G GS IP W-L QS Sv Hld P Strikes Balls TBF H 1B 2B 3B HR K BB HB WP
2026 BOS 1 0 3.1 0-0 0 0 0 41 26 15 10 1 1 0 0 0 3 0 0 0
RP MLB Percentile 0 0 13 0-38 0 0 0 6 7 93 6 96 89 76 11 64 12 95 38 34
RP MLB AVG 7 0 9.0 0-1 0 1 1 157 99 58 40 9 6 2 0 1 9 4 1 0
Career 1 0 3.1 0-0 0 0 0 41 26 15 10 1 1 0 0 0 3 0 0 0

Eduardo Rivera Advanced

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Year Team K% BB% AVG SLG OPS wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA xERA
2026 BOS 30.0% 0.0% .100 .100 .200 .091 .143 .143 .128 .120 .182 .172 95.5 91.9 12.4 0.56
RP MLB Percentile 83 95 97 98 99 99 94 96 97 99 93 98 2 39 53 99
RP MLB AVG 21.9% 11.4% .254 .412 .757 .340 .307 .338 .245 .337 .291 .380 88.4 89.7 13.4 4.86
Career 30.0% 0.0% .100 .100 .200 .091 .143 .143 .128 .120 .182 .172 95.5 91.9 12.4 0.56

Eduardo Rivera Pitch › Mix

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Year Team FF% (MPH) SI% (MPH) FC% (MPH) SL% (MPH) ST% (MPH) CB% (MPH) CH% (MPH) FS% (MPH) KN% (MPH) Fastball% Secondary%
2026 BOS 68.3% (95.1) - - 22.0% (85.3) - - 9.8% (87.8) - - 68.3% 31.7%
RP MLB Percentile 97 (61) - - 44 (35) - - 20 (64) - - 92.6% 6.8%
RP MLB AVG 34.4% (94.2) 26.9% (93.8) 21.5% (89.3) 27.5% (85.5) 23.4% (82.5) 18.2% (80.9) 19.3% (86.0) 21.0% (86.4) - (-) 47.0% 52.8%
Career 68.3% (95.1) - - 22.0% (85.3) - - 9.8% (87.8) - - 68.3% 31.7%

Eduardo Rivera Pitch › Results

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Year Team FF CSW% SI CSW% FC CSW% SL CSW% ST CSW% CB CSW% CH CSW% FS CSW% KN CSW% Fastball CSW% Secondary CSW%
2026 BOS 39.3% (6) - - 33.3% (1) - - 25.0% (1) - - 39.3% 30.8%
RP MLB Percentile 96 (37) - - 55 (78) - - 66 (16) - - 94.6% 61.3%
RP MLB AVG 26.5% (6) 28.0% (3) 28.1% (4) 31.1% (6) 29.1% (5) 28.7% (4) 22.3% (5) 25.4% (7) - (-) 27.8% 28.4%
Career 39.3% (6) - - 33.3% (1) - - 25.0% (1) - - 39.3% 30.8%

Eduardo Rivera Batted Ball › Contact

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Year Team GB% LD% FB% PU% SS% Pull% Cent% Oppo% Foul Str% PC% Fl&B% Solid% Brl% ICR
2026 BOS 57.1% 14.3% 14.3% 14.3% 14.3% 57.1% 42.9% 0.0% 9.8% 57.2% 42.9% 0.0% 0.0% 42.9%
RP MLB Percentile 83 78 18 73 97 90 80 0 4 32 3 71 79 29
RP MLB AVG 43.8% 21.9% 24.1% 10.3% 35.0% 41.5% 33.3% 25.1% 17.1% 61.4% 24.8% 5.9% 8.0% 38.4%
Career 57.1% 14.3% 14.3% 14.3% 14.3% 57.1% 42.9% 0.0% 9.8% 57.2% 42.9% 0.0% 0.0% 42.9%

Eduardo Rivera Batted Ball › Outcomes

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Year Team AVG wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA HR/FB ICR IPA%
2026 BOS .100 .091 .143 .143 .128 .120 .182 .172 95.5 91.9 12.4 0.0% 42.9% 30.0%
RP MLB Percentile 97 99 94 96 97 99 93 98 2 39 53 67 29 21
RP MLB AVG .254 .340 .307 .338 .245 .337 .291 .380 88.4 89.7 13.4 19.3% 38.4% 25.1%
Career .100 .091 .143 .143 .128 .120 .182 .172 95.5 91.9 12.4 0.0% 42.9% 30.0%

Eduardo Rivera Approach › Plate Discipline

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Year Team Zone% Str% Swing% O-Sw% Whiff% Foul Str% Con% Z-Con% O-Con% CS% SwStr% CSW% BIP% PLUS% IPR Str-ICR
2026 BOS 41.5% 63.4% 46.3% 33.3% 42.1% 9.8% 57.9% 63.6% 50.0% 17.1% 19.5% 36.6% 17.1% 61.0% 0.66 48.8%
RP MLB Percentile 32 53 52 65 97 4 97 98 66 54 95 96 56 78 85 42
RP MLB AVG 43.5% 62.4% 45.8% 30.2% 25.8% 17.1% 74.2% 83.8% 58.1% 16.5% 11.9% 28.4% 16.8% 56.7% 0.48 49.5%
Career 41.5% 63.4% 46.3% 33.3% 42.1% 9.8% 57.9% 63.6% 50.0% 17.1% 19.5% 36.6% 17.1% 61.0% 0.66 48.8%

Eduardo Rivera Approach › Locations

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Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2026 BOS 41.5% 29.3% 24.4% 46.3% 29.3% 24.4% 46.3% 7.3% 68.3% 4.9%
RP MLB Percentile 32 26 65 80 22 31 72 0 99 32
RP MLB AVG 43.5% 35.1% 26.1% 38.8% 36.6% 22.4% 41.0% 30.4% 43.5% 6.2%
Career 41.5% 29.3% 24.4% 46.3% 29.3% 24.4% 46.3% 7.3% 68.3% 4.9%

Eduardo Rivera Approach › Counts

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Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2026 BOS 63.4% 14.6% 22.0% 11.5% 60.0% 60.0% 15.4% 22.2% 33.3%
RP MLB Percentile 87 32 12 31 48 87 14 32 93
RP MLB AVG 58.6% 13.3% 28.8% 13.7% 59.2% 49.3% 21.0% 26.6% 19.8%
Career 63.4% 14.6% 22.0% 11.5% 60.0% 60.0% 15.4% 22.2% 33.3%

Eduardo Rivera PLV

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Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2026 BOS 41 5.29 48.8% 19.5% 31.7% 17.1% 0.0% -1.8 -1 1.78
RP MLB Percentile 6 93 70 72 78 78 93 85 80 96
RP MLB AVG 157 4.96 45.6% 18.2% 36.2% 9.3% 4.1% 1.3 +1 3.48
Career 41 5.29 48.8% 19.5% 31.7% 17.1% 0.0% -1.8 -1 1.78
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