The cutoff is the All-Star break. That is usually past game 81 and varies from year to year. Not sure how Baseball Reference defines before 1933.
So this means players are not all judged equally here. But this what we have. In fact, there is a pretty wide range in terms of percentage of PAs accumulated in the second half (that discussions comes last).
There were 754 players. 344 had positive differentials, meaning the their OPS in the 2nd half during their careers was higher than in the 1st half. Four players had no differential. 406 had a negative differential. The average was -.004.
Here are the top ten differentials. Ryan Howard stands out quite a bit. 45.5% of his career PAs came in the 2nd half.
|
Rk
|
Player
|
OPS1
|
OPS2
|
DIFF
|
|
1
|
Ryan Howard
|
0.805
|
0.924
|
0.119
|
|
2
|
Carlos Pena
|
0.769
|
0.858
|
0.089
|
|
3
|
Lance Johnson
|
0.676
|
0.763
|
0.087
|
|
4
|
Chase Headley
|
0.705
|
0.788
|
0.083
|
|
5
|
Mark Ellis
|
0.669
|
0.752
|
0.083
|
|
6
|
Ryan Zimmerman
|
0.780
|
0.862
|
0.082
|
|
7
|
Eddie Murray
|
0.799
|
0.878
|
0.079
|
|
8
|
Mickey Rivers
|
0.688
|
0.763
|
0.075
|
|
9
|
Adrian Beltre
|
0.784
|
0.859
|
0.075
|
|
10
|
Bill Madlock
|
0.774
|
0.846
|
0.072
|
Notice that these are all relatively recent players. Here are the bottom ten.
745
|
Mike Lowell
|
0.840
|
0.763
|
-0.077
|
746
|
Willie Jones
|
0.793
|
0.714
|
-0.079
|
747
|
Bing Miller
|
0.864
|
0.780
|
-0.084
|
748
|
Roger Maris
|
0.863
|
0.778
|
-0.085
|
749
|
Ivan Rodriguez
|
0.835
|
0.749
|
-0.086
|
750
|
Ryan Klesko
|
0.910
|
0.820
|
-0.090
|
751
|
Gus Suhr
|
0.845
|
0.751
|
-0.094
|
752
|
Chuck Klein
|
0.971
|
0.875
|
-0.096
|
753
|
Darin Erstad
|
0.786
|
0.686
|
-0.100
|
754
|
Fred Merkle
|
0.769
|
0.666
|
-0.103
|
These are not all recent players. Some go pretty far back. No outlier here like Howard.
I also looked at just all the players with 400+ career HRs (57 players).
|
Rk
|
Player
|
OPS1
|
OPS2
|
OPSDIFF
|
|
1
|
Eddie Murray
|
0.799
|
0.878
|
0.079
|
|
2
|
Adrian Beltre
|
0.784
|
0.859
|
0.075
|
|
3
|
Carlos Delgado
|
0.899
|
0.970
|
0.071
|
|
4
|
Mark Teixeira
|
0.845
|
0.901
|
0.056
|
|
5
|
Eddie Mathews
|
0.860
|
0.912
|
0.052
|
|
6
|
Mike Schmidt
|
0.885
|
0.934
|
0.049
|
|
7
|
Edwin Encarnacion
|
0.830
|
0.878
|
0.048
|
|
8
|
Duke Snider
|
0.901
|
0.940
|
0.039
|
|
9
|
Barry Bonds
|
1.034
|
1.072
|
0.038
|
|
10
|
Chipper Jones
|
0.913
|
0.951
|
0.038
|
Now for the biggest negative differentials.
48
|
Lou Gehrig
|
1.095
|
1.067
|
-0.028
|
49
|
Jim Thome
|
0.969
|
0.941
|
-0.028
|
50
|
Jimmie Foxx
|
1.052
|
1.024
|
-0.028
|
51
|
Mark McGwire
|
1.001
|
0.957
|
-0.044
|
52
|
Jose Canseco
|
0.892
|
0.837
|
-0.055
|
53
|
Carl Yastrzemski
|
0.869
|
0.811
|
-0.058
|
54
|
Adam Dunn
|
0.882
|
0.819
|
-0.063
|
55
|
Dave Winfield
|
0.857
|
0.792
|
-0.065
|
56
|
Mickey Mantle
|
1.010
|
0.941
|
-0.069
|
57
|
Willie Stargell
|
0.922
|
0.847
|
-0.075
|
Mantle has a reputation for being a carouser. I can't think of any reason why Willie Stargell is first. Now the same two tables for SLG.
Rk
|
Player
|
SLG1
|
SLG2
|
SLGDIFF
|
1
|
Eddie Murray
|
0.451
|
0.506
|
0.055
|
2
|
Adrian Beltre
|
0.454
|
0.509
|
0.055
|
3
|
Carlos Delgado
|
0.526
|
0.573
|
0.047
|
4
|
Mark Teixeira
|
0.492
|
0.532
|
0.040
|
5
|
Mike Schmidt
|
0.511
|
0.546
|
0.035
|
6
|
Eddie Mathews
|
0.492
|
0.527
|
0.035
|
7
|
Vladimir Guerrero
|
0.538
|
0.569
|
0.031
|
8
|
Barry Bonds
|
0.594
|
0.621
|
0.027
|
9
|
Edwin Encarnacion
|
0.487
|
0.514
|
0.027
|
10
|
Albert Pujols
|
0.537
|
0.564
|
0.027
|
48
|
Andre Dawson
|
0.491
|
0.473
|
-0.018
|
49
|
Jim Thome
|
0.564
|
0.542
|
-0.022
|
50
|
Lou Gehrig
|
0.644
|
0.622
|
-0.022
|
51
|
Mark McGwire
|
0.598
|
0.575
|
-0.023
|
52
|
Jose Canseco
|
0.534
|
0.491
|
-0.043
|
53
|
Carl Yastrzemski
|
0.483
|
0.439
|
-0.044
|
54
|
Dave Winfield
|
0.497
|
0.448
|
-0.049
|
55
|
Adam Dunn
|
0.513
|
0.461
|
-0.052
|
56
|
Mickey Mantle
|
0.584
|
0.527
|
-0.057
|
57
|
Willie Stargell
|
0.557
|
0.493
|
-0.064
|
Now, what I mentioned earlier. What percent of PAs were from the 2nd half? Here are the top 10 and bottom 10. The top 10 tended to play awhile back.
Rk
|
Player
|
PA2%
|
1
|
Luke Appling
|
56.18%
|
2
|
Joe Medwick
|
55.21%
|
3
|
Joe DiMaggio
|
54.86%
|
4
|
Jo-Jo Moore
|
54.78%
|
5
|
Lonnie Smith
|
54.74%
|
6
|
Lonny Frey
|
54.56%
|
7
|
Billy Goodman
|
54.40%
|
8
|
Bill Nicholson
|
54.35%
|
9
|
Dom DiMaggio
|
54.01%
|
10
|
Kiki Cuyler
|
54.01%
|
The bottom 10 are mostly more recent. Maybe it has to do with when All-Star games were played.
745
|
Mark Reynolds
|
41.13%
|
746
|
J.D. Drew
|
40.97%
|
747
|
Barry Larkin
|
40.96%
|
748
|
Jose Guillen
|
40.95%
|
749
|
Prince Fielder
|
40.92%
|
750
|
Jack Clark
|
40.74%
|
751
|
Jay Bruce
|
40.09%
|
752
|
Hanley Ramirez
|
40.00%
|
753
|
Dave Concepcion
|
39.93%
|
754
|
Dustin Pedroia
|
39.43%
|
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