Postseason, through 1987 World Series Game 5, Puckett was actually quite close to Mauer's overall postseason line:
Player
G
Rslt
PA
AB
R
H
2B
3B
HR
RBI
BB
SO
HBP
GDP
SB
CS
BA
OBP
SLG
OPS
BAbip
aLI
WPA
acLI
cWPA
RE24
Puckett
10
6-4
46
44
4
9
1
1
1
4
1
5
1
0
1
0
.205
.239
.341
.580
.211
0.88
0.138
33.29
-0.14%
-1.57
Mauer
10
0-10
44
40
1
11
1
0
0
1
4
7
0
1
0
0
.275
.341
.300
.641
.333
1.03
-0.222
15.47
-2.65%
-1.48
Still a positive WPA for Puckett, I'd guess due to the XBH and RBI advantage? Also the BAbip suggests some bad luck for Puck?
Of course, from 1987 game 6 onward...
Player
G
Rslt
PA
AB
R
H
2B
3B
HR
RBI
BB
IBB
SO
HBP
SH
SF
ROE
GDP
SB
CS
BA
OBP
SLG
OPS
BAbip
aLI
WPA
acLI
cWPA
RE24
Puckett
14
10-4
63
53
12
21
2
1
4
12
7
4
12
0
1
2
1
1
2
0
.396
.452
.698
1.150
.436
1.33
0.972
102.16
38.73%
6.46
cWPA% means Puckett basically won 38.6% of a championship by himself in his postseason career, despite the slow start. On a per-PA basis, that's behind Speaker, Gehrig, Freese, and Berkman from the Baseball-Reference career postseason top 10 list, but ahead of Mantle, Rose, Springer, Jackson, and Ortiz.