资料来源：Baseball Reference
以下均为在各年6/30日前，尚未满20岁的球员当季在大联盟出赛成绩(1871~2012/9/23)
有出赛纪录的(G≧1)：988
有达到规定打席的(Qualified for Batting Title)：44
SLG (Qualified)
Rank Year Age Team
1. Mel Ott .524 1928 19 NYG
2. Cap Anson .467 1871 19 ROK
3. Bryce Harper .450 2012 19 WSN
6. Ken Griffey .420 1989 19 SEA
OPS (Qualified)
1. Mel Ott .921 1928 19 NYG
2. Cap Anson .803 1871 19 ROK
3. Dick Higham .790 1871 19 NYU
4. Bryce Harper .779 2012 19 WSN
9. Ken Griffey .748 1989 19 SEA
ISO (Qualified)
1. Mel Ott .202 1928 19 NYG
2. Bryce Harper .192 2012 19 WSN
3. Fred Carroll .163 1884 19 COL
4. Ken Griffey .156 1989 19 SEA
2B
1. Phil Cavarretta 28 1935 18 CHC
1. Robin Yount 28 1975 19 MIL
3. Mel Ott 26 1928 19 NYG
4. Bryce Harper 23 2012 19 WSN
4. Ken Griffey 23 1989 19 SEA
HR
1. Tony Conigliaro 24 1964 19 BOS
2. Bryce Harper 19 2012 19 WSN
3. Mel Ott 18 1928 19 NYG
4. Ken Griffey 16 1989 19 SEA
5. Mickey Mantle 13 1951 19 NYY
RBI
1. Phil Cavarretta 82 1935 18 CHC
2. Mel Ott 77 1928 19 NYG
11. Bryce Harper 52 2012 19 WSN
SB
1. Ty Cobb 23 1906 19 DET
5. Ken Griffey 16 1989 19 SEA
8. Bryce Harper 14 2012 19 WSN
Extra Base Hit
1. Bryce Harper 50 2012 19 WSN
2. Mel Ott 48 1928 19 NYG
2. Phil Cavarretta 48 1935 18 CHC
6. Ken Griffey 39 1989 19 SEA
WAR (Position Players)
1. Bryce Harper 3.9 2012 19 WSN
2. Mel Ott 3.7 1928 19 NYG
3. Edgar Renteria 3.1 1996 19 FLA
4. Ken Griffey 2.9 1989 19 SEA
结论：还蛮强的.....