Using innings played to compute full seasons of Hall of Fame catchers

I wondered where Joe Mauer would rank since he just got elected. I used Stathead to call up all the Hall of Famers who played at least 10% of their games at catcher.

Then I divided their innings at catcher by 9. That was then divided by 162 to get full-season equivalents. There are some guys on the list like Biggio who are not known for being catchers. 

Mauer ranks 16th with only 5.41 full-season equivalents.

Player	Innings	Games	Seasons
Ivan Rodriguez	20,348	2,260.89	13.96
Carlton Fisk	18,511	2,056.78	12.70
Gary Carter	17,368	1,929.78	11.91
Rick Ferrell	15,146	1,682.89	10.39
Ted Simmons	15,092	1,676.89	10.35
Gabby Hartnett	15,044	1,671.56	10.32
Johnny Bench	14,487	1,609.67	9.94
Ray Schalk	14,385	1,598.33	9.87
Bill Dickey	14,381	1,597.89	9.86
Yogi Berra	14,346	1,594.00	9.84
Mike Piazza	13,555	1,506.11	9.30
Ernie Lombardi	12,644	1,404.89	8.67
Mickey Cochrane	12,022	1,335.78	8.25
Roy Campanella	11,282	1,253.56	7.74
Roger Bresnahan	7,916	879.56	5.43
Joe Mauer	7,883	875.89	5.41
Buck Ewing	5,412	601.33	3.71
King Kelly	4,380	486.67	3.00
Biz Mackey	4,352	483.56	2.98
Deacon White	3,889	432.11	2.67
Josh Gibson	3,689	409.89	2.53
Craig Biggio	3,493	388.11	2.40
Jim O'Rourke	1,668	185.33	1.14
Frank Chance	1,370	152.22	0.94
Louis Santop	294	32.67	0.20