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Since 1950, Tom Browning, Bob Grim and Harvey Haddix are tied for winning the most games by a rookie, with 20 wins.

most wins by a rookie pitcher since 1950
Interpreted as:
most regular-season wins by a rookie pitcher since 1950
1985Browning1954Grim1953Haddix1976Fidrych1968Koosman1964Bunker1963Peters1957Sanford2012Lynn1970Morton1960Estrada2006Verlander2001Sabathia1999Garcia1992Fleming1989Gordon1984Gooden1984Langston1979Sutcliffe1968Bahnsen2019Hudson2018Yarbrough20202019191919191818181717171717171717171616
NAMEWSEASONTMLW%GGSERASOCGSHOSVIPHERRHRBBHBPGFIBBTBFWPK/9BB/9K/BBHR/9K%BB%WHIPBABIPRAERA-FIPFIP-H/9PRAA
Tom BrowningTom Browning201985
CINCIN
9.69038383.55155640261.124210311129733081,08325.342.512.121.0014.36.71.21.2593.82953.811028.33-1.9
Bob GrimBob Grim201954
NYYNYY
6.76937203.26108811199.017572789853882544.883.841.270.4113.110.31.31.2683.53923.23917.917.1
Harvey HaddixHarvey Haddix201953
SLNSLN
9.69036333.061631961253.022086972469421,03195.802.452.360.8515.86.71.14.2543.45713.40797.8325.1
Mark FidrychMark Fidrych191976
DETDET
9.67931292.34972440250.12176576125332399663.491.911.830.439.75.31.08.2472.73633.15867.8013.7
Jerry KoosmanJerry Koosman191968
NYMNYM
12.61335342.081781770263.2221617216698071,05886.082.362.580.5516.86.51.10.2602.46702.70967.543.7
Wally BunkerWally Bunker191964
BALBAL
5.79229292.69961210214.01616472176230585034.042.611.550.7111.37.31.04.2143.03773.651006.77-0.2
Gary PetersGary Peters191963
CWSCWS
8.70441302.331891341243.0192636996884297857.002.522.780.3319.37.01.07.2602.56672.34677.1132.1
Jack SanfordJack Sanford191957
PHIPHI
8.70433333.081881530236.219481942294302989127.153.572.000.8419.09.51.22.2523.57803.31877.3812.6
Lance LynnLance Lynn182012
STLSTL
7.72035293.78180000176.016874761664102374439.203.272.810.8224.28.61.32.3213.89983.48908.597.4
Carl MortonCarl Morton181970
MONMON
11.62143373.601541040284.22811141232712541171,21824.873.951.230.8512.610.31.43.2803.89874.141068.88-6.8
Chuck EstradaChuck Estrada181960
BALBAL
11.62136253.581441212208.2162838718101156388326.214.361.430.7816.311.41.26.2383.75973.941046.99-4
Justin VerlanderJustin Verlander172006
DETDET
9.65430303.63124110186.01877578216060177656.002.902.071.0216.07.71.33.2943.77804.34969.053.6
CC SabathiaCC Sabathia172001
CLECLE
5.77333334.39171000180.11498893199570176378.534.741.800.9522.412.51.35.2764.64984.21947.445.2
Freddy GarciaFreddy Garcia171999
SEASEA
8.68033334.07170210201.1205919618901004888127.604.021.890.8019.110.11.47.3124.29874.09879.1613.7
Dave FlemingDave Fleming171992
SEASEA
10.63033333.39112740228.12258695136040394684.412.361.870.5111.86.31.25.2803.74863.38868.8714.2
Tom GordonTom Gordon171989
KCRKCR
9.65449163.64153111163.0122666710861164677128.454.751.780.5522.612.71.28.2623.70943.28896.747.3
Dwight GoodenDwight Gooden171984
NYMNYM
9.65431312.60276730218.01616372773202879311.393.013.780.2931.48.31.07.2962.97741.68486.6544.6
Mark LangstonMark Langston171984
SEASEA
10.63035333.40204520225.018885991611880596548.164.721.730.6421.112.21.36.2783.96843.55857.5215.4
Rick SutcliffeRick Sutcliffe171979
LADLAD
10.63039303.46117510242.02179310416972261,01684.353.611.210.6011.59.51.30.2563.87953.841018.07-0.8
Stan BahnsenStan Bahnsen171968
NYYNYY
12.58637342.051621010267.1216617214682361,07045.452.292.380.4715.16.41.06.2452.42732.64887.2710.1
Dakota HudsonDakota Hudson162019
STLSTL
7.69633323.35136001174.21606580228691875757.014.431.581.1318.011.41.41.2744.12804.911158.24-12.7
Ryan YarbroughRyan Yarbrough162018
TBRTBR
6.7273863.91128000147.11406470185083662817.823.052.561.1020.48.01.29.2884.28954.191038.55-2.4
Kenta MaedaKenta Maeda162016
LADLAD
11.59332323.48179000175.21506872205080671669.172.563.581.0225.07.01.14.2833.69873.57887.699.2
Matt ShoemakerMatt Shoemaker162014
LAALAA
4.80027203.04124000136.01224649142445054358.211.595.170.9322.84.41.07.2863.24843.26898.076.3
Yu DarvishYu Darvish162012
TEXTEX
9.64029293.90221000191.1156838914891001816810.404.192.480.6627.110.91.28.2954.19903.28777.3420.3
Wade MileyWade Miley
Ivan NovaIvan Nova
Jason JenningsJason Jennings
Mike BoddickerMike Boddicker
Ron GuidryRon Guidry
Jim HughesJim Hughes
Steve BusbySteve Busby
Dick HughesDick Hughes
Tom SeaverTom Seaver
Herb ScoreHerb Score
Luis GilLuis Gil
Shota ImanagaShota Imanaga
Shelby MillerShelby Miller
Daisuke MatsuzakaDaisuke Matsuzaka
Jeriome RobertsonJeriome Robertson
Rodrigo LopezRodrigo Lopez
Teddy HigueraTeddy Higuera
Craig McMurtryCraig McMurtry
Ken SchromKen Schrom
Britt BurnsBritt Burns
Dave RozemaDave Rozema
Dennis LeonardDennis Leonard
John MontefuscoJohn Montefusco
Jon MatlackJon Matlack
Don SchwallDon Schwall

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