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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

Needs more playing time to qualify
MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
0 3.1 0.00 0.30 30.0% 0.0%
160th 1
Sv
354th 24.0
IP
1st 4.43
ERA
1st 1.40
WHIP
39th 22.2%
K%
1st 10.4%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
95.1 19.5% 36.6% 48.8% 0.0% 5.26 1.77
131st 94.3
FB MPH
8th 11.9%
SwStr%
4th 28.5%
CSW%
226th 50.4%
Str-ICR
1st 4.6%
MTK%
9th 4.93
PLV
3rd 3.50
PLA

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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 1.17 1.92 1.77 30.0% 0.0% 2.7 0.00 .143 0.0% 100.0% 42.9% 57.1% 19.5% 36.6% 0.66 5.26
RP MLB Percentile 0 0 0 0-66 0 0 99 100 100 99 98 99 88 100 99 90 98 90 99 17 91 98 99 90 97
RP MLB AVG 19 1 24.0 1-1 1 3 4.43 1.40 4.32 4.31 4.36 3.50 22.2% 10.4% 8.5 1.08 .293 17.6% 71.8% 37.4% 43.6% 11.9% 28.5% 0.49 4.93
Career 1 0 3.1 0-0 0 0 0.00 0.30 0.57 1.30 2.00 1.77 30.0% 0.0% 2.7 0.00 .143 0.0% 100.0% 42.9% 57.1% 19.5% 36.6% 0.66 5.26

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 0 0-66 0 0 0 0 0 100 0 100 100 94 29 90 1 100 64 53
RP MLB AVG 19 1 24.0 1-1 0 1 3 402 255 148 103 22 14 4 0 3 23 10 1 1
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 .090 .143 .143 .128 .119 .182 .169 95.5 91.9 12.4 0.56
RP MLB Percentile 88 100 99 99 100 100 98 99 99 100 98 100 0 26 54 100
RP MLB AVG 22.2% 10.4% .242 .391 .720 .320 .293 .322 .238 .323 .284 .365 87.9 89.4 13.2 4.32
Career 30.0% 0.0% .100 .100 .200 .090 .143 .143 .128 .119 .182 .169 95.5 91.9 12.4 0.57

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 (33) - - 28 (63) - - 94.9% 4.8%
RP MLB AVG 37.5% (94.3) 25.6% (93.9) 21.6% (89.4) 26.2% (85.4) 21.9% (82.5) 17.6% (79.8) 18.4% (86.2) 19.8% (86.5) 31.8% (68.1) 47.6% 52.2%
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 97 (64) - - 69 (84) - - 63 (14) - - 98.0% 67.8%
RP MLB AVG 26.9% (14) 27.4% (6) 27.1% (7) 29.3% (12) 28.2% (11) 27.0% (7) 21.8% (10) 24.4% (13) 23.3% (6) 27.9% 28.6%
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 91 89 8 81 100 97 89 0 0 18 0 95 96 17
RP MLB AVG 43.6% 21.8% 24.2% 10.3% 34.7% 41.4% 33.6% 25.1% 17.7% 62.3% 24.7% 5.9% 7.2% 37.4%
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 .090 .143 .143 .128 .119 .182 .169 95.5 91.9 12.4 0.0% 42.9% 30.0%
RP MLB Percentile 99 100 98 99 99 100 98 100 0 26 54 90 17 14
RP MLB AVG .242 .320 .293 .322 .238 .323 .284 .365 87.9 89.4 13.2 17.6% 37.4% 24.7%
Career .100 .090 .143 .143 .128 .119 .182 .169 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 20 47 45 66 99 0 99 100 80 60 98 99 48 83 90 35
RP MLB AVG 44.4% 63.2% 46.7% 31.0% 25.5% 17.7% 74.5% 84.0% 58.5% 16.5% 11.9% 28.5% 17.0% 57.8% 0.49 50.4%
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 20 19 73 88 19 30 77 0 100 12
RP MLB AVG 44.4% 34.6% 26.9% 38.5% 36.2% 22.8% 41.0% 30.1% 43.0% 6.5%
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 94 21 3 18 46 95 6 21 99
RP MLB AVG 58.5% 12.6% 29.5% 14.3% 60.3% 49.7% 21.2% 26.2% 19.2%
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 5.26 48.8% 22.0% 29.3% 19.5% 0.0% -1.8 -1 1.77
RP MLB Percentile 0 97 76 96 96 96 99 66 60 99
RP MLB AVG 402 4.93 46.0% 17.0% 37.0% 9.1% 4.6% 0.6 +0 3.50
Career 41 5.26 48.8% 22.0% 29.3% 19.5% 0.0% -1.8 -1 1.77
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