Just How Rare Was V-Mart's Season?

Victor Martinez hit .335/.409/.565 with 32 HR and a 166 wRC+ in 2014.  He hit career highs in batting average, on-base percentage, slugging percentage, home runs, ISO, wOBA, wRC+ and probably a few more categories that I'm missing.  It was the first time he hit at least 30 HR, had a .400 OBP and at least a .400 wOBA and a 140 wRC+.  It was only the 2nd time he reached a .500 SLG and the 3rd time he reached a .200 ISO.  No question about it, it was definitely a career year for Victor Martinez.  At the age of 35.  How rare is that?  

Using an arbitrary 165 wRC+ cutoff, here is a list of players since 1901 who reached that mark at age 35 or higher.  Several have done it more than once, so only the highest wRC+ season is listed.  

Year	Player	Age	wRC+
2002	Barry Bonds	37	244
1957	Ted Williams	38	223
1931	Babe Ruth	36	206
1910	Nap Lajoie	35	194
1971	Hank Aaron	37	191
1923	Tris Speaker	35	178
2008	Chipper Jones	36	174
1909	Honus Wagner	35	174
1944	Bob Johnson	38	169
1999	Mark McGwire	35	168
1922	Ty Cobb	35	167
1957	Stan Musial	36	167
1944	Mel Ott	35	167
2014	Victor Martinez	35	166
1924	Zack Wheat	36	166
2008	Manny Ramirez	36	165

That's a pretty impressive group of players.  Several all-stars and hall of famers.  Only one or two non-immediately recognized players.  16 players in all and V-Mart is the first to do so since 2008 when Chipper Jones and Manny Ramirez did it.  

So how many of these players were like V-Mart and had their career year at age 35 or higher?  Well, all of these players had at least 1 season of at least 150+ wRC+ prior to their age-35 season.  However, 6 of these players were like V-Mart and had their highest wRC+ at age 35 or higher.  

Player	Highest wRC+	2nd Highest wRC+	Difference
Victor Martinez	166	130	36
Bob Johnson	169	150	19
Zack Wheat	166	151	15
Hank Aaron	191	178	13
Barry Bonds	244	235	9
Chipper Jones	174	165	9
Ted Williams	223	221	2

And here we see the biggest difference between Victor Martinez and everyone else on this list.  The difference between V-Mart's best wRC+ season and his 2nd highest wRC+ season was bigger than the other 6.  Almost twice as much as the 2nd biggest difference, in fact.

Yep, I would say that puts V-Mart's season in very rare company.