The BBWAA announces its Hall of Fame results on Wednesday. I wanted to see what the WGOM thought about this year's ballot. The rules are the same as the BBWAA ballot: pick anyone you want up to ten. Here's baseball-reference's page on the ballot.
Last year Mauer hit .324/.404/.476 in 113 games: 75 at catcher, 29 at DH, and 8 at first. Let's assume he does similar in 2014 but with 150 games all at first.
DRS rates Mauer's defense over a full year (unsure if that's 150 or 162 games) at +2 runs; UZR says +8 runs; TZL says +7 runs. I'm going to assume +5 runs.
Extrapolating things a bit to more games, but at first, gives the following rWAR figures.
Year
G
PA
Rbat
Rbaser
Rdp
Rfield
Rpos
RAA
WAA
Rrep
RAR
WAR
2013
113
508
26
-1
1
6
2
34
3.8
17
51
5.4
2014
150
654
34
-1
0
5
-12
26
2.9
22
48
5.3
Almost exactly the same. A large part of that is due to many more plate appearances. I don't know how much his defense will improve at first given experience. DRS really liked him this year, but UZR didn't. If instead he averages +10 runs at first, that's bordering on a six-win season.