This list shows all the players who had 2,000+ PAs from ages 31-37 and also had 500+ PAs under the age of 31, through the 2009 season.  RATE is simply the players slugging percentage divided by the league slugging percentage. Ratio is the old rate divided by the young rate. For Caminiti, he gets 124/94 = 1.32. So his SLG improved the most, relative to the league average.

 

Rank

Player

Age

RATE

SLG

LG SLG

Age

RATE

SLG

LG SLG

Ratio

1

Ken Caminiti

Under 31

94

0.371

0.393

31-37

124

0.531

0.428

1.32

2

Skeeter Newsome

Under 31

67

0.286

0.427

31-37

86

0.318

0.368

1.28

3

Eddie Joost

Under 31

81

0.301

0.371

31-37

103

0.406

0.392

1.27

4

George Harper

Under 31

94

0.351

0.375

31-37

118

0.489

0.416

1.26

5

Roberto Clemente

Under 31

110

0.446

0.407

31-37

137

0.524

0.383

1.25

6

Ken Williams

Under 31

114

0.432

0.379

31-37

140

0.577

0.412

1.23

7

Mark McGwire

Under 31

128

0.507

0.397

31-37

157

0.683

0.435

1.23

8

Tom Paciorek

Under 31

93

0.360

0.385

31-37

114

0.450

0.395

1.23

9

Jim Hickman

Under 31

98

0.384

0.392

31-37

120

0.464

0.386

1.22

10

Andres Galarraga

Under 31

111

0.436

0.392

31-37

135

0.563

0.418

1.22

11

Luis Gonzalez

Under 31

104

0.432

0.415

31-37

124

0.542

0.436

1.19

12

Mark DeRosa

Under 31

88

0.380

0.432

31-37

104

0.448

0.431

1.18

13

Ray Mueller

Under 31

86

0.340

0.397

31-37

101

0.381

0.379

1.18

14

Melvin Mora

Under 31

90

0.388

0.433

31-37

106

0.455

0.429

1.18

15

Don Buford

Under 31

92

0.353

0.382

31-37

108

0.405

0.374

1.17

16

Ernie Whitt

Under 31

93

0.366

0.394

31-37

109

0.437

0.402

1.17

17

Cy Seymour

Under 31

108

0.398

0.370

31-37

126

0.414

0.329

1.17

18

Brian Downing

Under 31

97

0.374

0.384

31-37

113

0.457

0.405

1.16

19

Hal Chase

Under 31

109

0.364

0.335

31-37

126

0.433

0.345

1.16

20

Barry Bonds

Under 31

136

0.541

0.399

31-37

157

0.678

0.431

1.15

21

Cy Williams

Under 31

111

0.380

0.343

31-37

128

0.508

0.398

1.15

22

Steve Finley

Under 31

98

0.392

0.400

31-37

113

0.487

0.432

1.15

23

Bill Mueller

Under 31

92

0.399

0.435

31-37

106

0.455

0.429

1.15

24

Jermaine Dye

Under 31

107

0.463

0.433

31-37

123

0.525

0.427

1.15

25

Tony Phillips

Under 31

87

0.350

0.402

31-37

100

0.412

0.411

1.15

26

Augie Galan

Under 31

102

0.404

0.396

31-37

117

0.442

0.378

1.15

27

Bill Robinson

Under 31

105

0.393

0.374

31-37

120

0.469

0.390

1.14

28

Otis Nixon

Under 31

69

0.269

0.389

31-37

79

0.327

0.414

1.14

29

Chief Zimmer

Under 31

92

0.322

0.352

31-37

105

0.412

0.392

1.14

30

Lou Whitaker

Under 31

101

0.406

0.402

31-37

115

0.453

0.395

1.14

31

Mike Bordick

Under 31

79

0.329

0.416

31-37

90

0.390

0.434

1.14

32

Ellis Burks

Under 31

116

0.467

0.401

31-37

132

0.568

0.430

1.14

33

Bret Boone

Under 31

97

0.412

0.425

31-37

110

0.474

0.431

1.13

34

Germany Schaefer

Under 31

91

0.296

0.324

31-37

103

0.345

0.334

1.13

35

Bengie Molina

Under 31

92

0.397

0.432

31-37

104

0.446

0.430

1.13

36

Ezra Sutton

Under 31

102

0.340

0.335

31-37

115

0.407

0.355

1.13

37

Ozzie Smith

Under 31

79

0.306

0.387

31-37

89

0.348

0.390

1.13

38

Willie Stargell

Under 31

130

0.503

0.387

31-37

146

0.560

0.383

1.12

39

Johnny Kling

Under 31

98

0.340

0.345

31-37

110

0.374

0.341

1.12

40

Joe Cronin

Under 31

108

0.453

0.419

31-37

121

0.499

0.413

1.12

41

Edgar Martinez

Under 31

117

0.456

0.391

31-37

131

0.570

0.436

1.12

42

Frank White

Under 31

92

0.356

0.387

31-37

103

0.418

0.405

1.12

43

Paul Molitor

Under 31

108

0.433

0.402

31-37

120

0.475

0.397

1.11

44

Brady Anderson

Under 31

96

0.382

0.399

31-37

106

0.460

0.435

1.10

45

Julio Franco

Under 31

100

0.403

0.401

31-37

110

0.452

0.410

1.10

46

Ron Fairly

Under 31

101

0.392

0.390

31-37

111

0.428

0.386

1.10

47

Art Howe

Under 31

91

0.361

0.399

31-37

100

0.386

0.387

1.10

48

Jeff Kent

Under 31

112

0.471

0.419

31-37

123

0.534

0.435

1.10

49

Mike Stanley

Under 31

102

0.409

0.399

31-37

112

0.487

0.436

1.10

50

Lonnie Smith

Under 31

104

0.406

0.392

31-37

114

0.447

0.392

1.10

51

Frank Howard

Under 31

125

0.488

0.391

31-37

137

0.513

0.375

1.10

52

B.J. Surhoff

Under 31

95

0.380

0.400

31-37

104

0.456

0.438

1.09

53

Eddie Bressoud

Under 31

95

0.393

0.413

31-37

104

0.408

0.394

1.09

54

Tony Taylor

Under 31

86

0.347

0.404

31-37

94

0.357

0.378

1.09

55

Hank Majeski

Under 31

96

0.371

0.385

31-37

105

0.418

0.397

1.09

56

Chili Davis

Under 31

108

0.422

0.391

31-37

118

0.493

0.417

1.09

57

Sammy Sosa

Under 31

123

0.510

0.416

31-37

134

0.583

0.434

1.09

58

Lee Lacy

Under 31

101

0.387

0.384

31-37

110

0.431

0.390

1.09

59

Bill Bruton

Under 31

90

0.378

0.422

31-37

98

0.402

0.409

1.09

60

Eddie Stanky

Under 31

85

0.323

0.378

31-37

93

0.378

0.407

1.09

61

Willie Davis

Under 31

103

0.404

0.391

31-37

112

0.427

0.381

1.09

62

Danny Murphy

Under 31

116

0.391

0.338

31-37

126

0.421

0.335

1.09

63

Mickey Vernon

Under 31

105

0.402

0.384

31-37

114

0.449

0.394

1.09

64

Omar Vizquel

Under 31

81

0.335

0.413

31-37

88

0.383

0.434

1.08

65

Tommy Henrich

Under 31

118

0.487

0.411

31-37

128

0.495

0.388

1.08

66

Ed Delahanty

Under 31

130

0.497

0.381

31-37

141

0.525

0.373

1.08

67

Dixie Walker

Under 31

108

0.441

0.409

31-37

117

0.440

0.377

1.08

68

Doc Casey

Under 31

85

0.318

0.374

31-37

92

0.321

0.349

1.08

69

Luis Aparicio

Under 31

85

0.342

0.402

31-37

92

0.347

0.377

1.08

70

Lance Johnson

Under 31

91

0.361

0.399

31-37

98

0.417

0.428

1.08

71

Jim Edmonds

Under 31

118

0.512

0.435

31-37

127

0.550

0.434

1.08

72

Johnny Moore

Under 31

106

0.438

0.413

31-37

114

0.452

0.397

1.08

73

Pete Runnels

Under 31

93

0.365

0.395

31-37

100

0.399

0.400

1.08

74

Bobby Estalella1

Under 31

107

0.447

0.419

31-37

115

0.416

0.362

1.07

75

Jorge Posada

Under 31

107

0.465

0.434

31-37

115

0.493

0.429

1.07

76

Carl Furillo

Under 31

108

0.433

0.401

31-37

116

0.487

0.421

1.07

77

Honus Wagner

Under 31

137

0.493

0.359

31-37

147

0.493

0.336

1.07

78

Hank Aaron

Under 31

138

0.567

0.411

31-37

148

0.571

0.385

1.07

79

Jimmy Collins

Under 31

111

0.425

0.383

31-37

119

0.413

0.347

1.07

80

Johnny Damon

Under 31

99

0.431

0.434

31-37

106

0.454

0.428

1.07

81

Dante Bichette

Under 31

114

0.457

0.402

31-37

122

0.524

0.430

1.07

82

Jose Valentin

Under 31

100

0.435

0.435

31-37

107

0.463

0.431

1.07

83

Mike Cameron

Under 31

100

0.434

0.433

31-37

107

0.465

0.432

1.07

84

David Segui

Under 31

101

0.419

0.414

31-37

108

0.471

0.436

1.07

85

Gary Matthews Jr.

Under 31

92

0.397

0.432

31-37

98

0.420

0.428

1.07

86

Tony Gwynn

Under 31

111

0.435

0.390

31-37

118

0.483

0.410

1.06

87

John Vander Wal

Under 31

100

0.408

0.408

31-37

106

0.461

0.436

1.06

88

Walt Weiss

Under 31

77

0.306

0.400

31-37

81

0.348

0.428

1.06

89

Jimmy Austin

Under 31

87

0.281

0.322

31-37

92

0.318

0.346

1.06

90

Andre Dawson

Under 31

122

0.476

0.390

31-37

129

0.503

0.391

1.06

91

Gary Sheffield

Under 31

122

0.501

0.411

31-37

129

0.559

0.433

1.06

92

Mickey Tettleton

Under 31

107

0.424

0.396

31-37

113

0.474

0.418

1.06

93

Graig Nettles

Under 31

108

0.409

0.377

31-37

114

0.444

0.390

1.06

94

Dave Philley

Under 31

92

0.364

0.396

31-37

97

0.380

0.393

1.05

95

Patsy Donovan

Under 31

93

0.358

0.386

31-37

98

0.363

0.371

1.05

96

Davey Lopes

Under 31

94

0.363

0.384

31-37

99

0.388

0.392

1.05

97

Tilly Walker

Under 31

113

0.386

0.340

31-37

119

0.478

0.402

1.05

98

Charlie Gehringer

Under 31

114

0.473

0.415

31-37

120

0.510

0.426

1.05

99

Bones Ely

Under 31

83

0.292

0.353

31-37

87

0.344

0.394

1.05

100

Moises Alou

Under 31

117

0.489

0.416

31-37

123

0.533

0.433

1.05

101

Jason Varitek

Under 31

98

0.427

0.435

31-37

103

0.440

0.428

1.05

102

Jay Bell

Under 31

98

0.396

0.403

31-37

103

0.448

0.436

1.05

103

Cookie Rojas

Under 31

87

0.332

0.383

31-37

91

0.343

0.376

1.05

104

Casey Blake

Under 31

102

0.439

0.432

31-37

107

0.455

0.426

1.05

105

Kitty Bransfield

Under 31

102

0.355

0.346

31-37

107

0.351

0.328

1.05

106

Dolph Camilli

Under 31

125

0.503

0.403

31-37

131

0.497

0.380

1.05

107

Johnny Temple

Under 31

83

0.348

0.419

31-37

87

0.354

0.407

1.05

108

Ray Boone

Under 31

106

0.417

0.394

31-37

111

0.443

0.400

1.05

109

Stan Javier

Under 31

85

0.341

0.401

31-37

89

0.385

0.431

1.05

110

Joe Morgan

Under 31

109

0.422

0.388

31-37

114

0.445

0.389

1.05

111

Larry Walker

Under 31

133

0.542

0.408

31-37

139

0.602

0.434

1.05

112

Mark Grudzielanek

Under 31

90

0.386

0.431

31-37

94

0.404

0.431

1.04

113

Kirby Puckett

Under 31

117

0.466

0.400

31-37

122

0.501

0.411

1.04

114

Willie Mays

Under 31

141

0.585

0.416

31-37

147

0.568

0.387

1.04

115

Don Hoak

Under 31

94

0.392

0.419

31-37

98

0.400

0.408

1.04

116

Randy Winn

Under 31

95

0.411

0.432

31-37

99

0.426

0.431

1.04

117

Mark McLemore

Under 31

79

0.325

0.413

31-37

82

0.357

0.436

1.04

118

Zack Wheat

Under 31

119

0.420

0.352

31-37

124

0.494

0.398

1.04

119

Al Kaline

Under 31

123

0.492

0.399

31-37

128

0.480

0.375

1.04

120

Rafael Palmeiro

Under 31

123

0.491

0.399

31-37

128

0.559

0.435

1.04

121

Ray Durham

Under 31

99

0.430

0.434

31-37

103

0.446

0.434

1.04

122

Dode Paskert

Under 31

101

0.355

0.352

31-37

105

0.364

0.345

1.04

123

Tom Daly

Under 31

101

0.386

0.383

31-37

105

0.388

0.371

1.04

124

Larry Bowa

Under 31

82

0.314

0.384

31-37

85

0.334

0.392

1.04

125

Lave Cross

Under 31

102

0.391

0.384

31-37

106

0.396

0.374

1.04

126

Billy Jurges

Under 31

86

0.341

0.398

31-37

89

0.333

0.375

1.04

127

Rabbit Warstler

Under 31

68

0.284

0.415

31-37

71

0.289

0.404

1.04

128

Mike Schmidt

Under 31

135

0.525

0.388

31-37

140

0.549

0.392

1.04

129

Pepper Martin

Under 31

109

0.434

0.397

31-37

113

0.452

0.399

1.04

130

Raul Ibanez

Under 31

109

0.469

0.432

31-37

113

0.483

0.427

1.04

131

Doug DeCinces

Under 31

110

0.428

0.389

31-37

114

0.462

0.407

1.04

132

Freddie Patek

Under 31

84

0.316

0.376

31-37

87

0.337

0.390

1.04

133

Sid Gordon

Under 31

114

0.434

0.382

31-37

118

0.486

0.411

1.04

134

Joe Adcock

Under 31

115

0.480

0.416

31-37

119

0.484

0.406

1.03

135

Roy Sievers

Under 31

117

0.468

0.399

31-37

121

0.485

0.399

1.03

136

Max Bishop

Under 31

87

0.363

0.417

31-37

90

0.372

0.412

1.03

137

Mark Loretta

Under 31

89

0.390

0.436

31-37

92

0.399

0.433

1.03

138

Bill Terry

Under 31

120

0.499

0.418

31-37

124

0.510

0.412

1.03

139

Brett Butler

Under 31

94

0.380

0.402

31-37

97

0.381

0.393

1.03

140

Juan Beniquez

Under 31

95

0.364

0.383

31-37

98

0.397

0.403

1.03

141

Ron Hassey

Under 31

95

0.377

0.397

31-37

98

0.390

0.398

1.03

142

Jim