About Me

My photo

Nice guy.  Have some blogs.  Do baseball research.

Monday, January 14, 2013

Home Run Proficiency: Bonds, Aaron, Ruth, Mays.

Starting to look at batters with at least 493 home runs (HR).

Rk Player HR From To Age G PA AB R H 2B 3B RBI BB IBB SO HBP SH SF GDP SB CS BA OBP SLG OPS Pos Tm
1 Barry Bonds 762 1986 2007 21-42 2986 12606 9847 2227 2935 601 77 1996 2558 688 1539 106 4 91 165 514 141 .298 .444 .607 1.051 *78/D9 PIT-SFG
2 Hank Aaron 755 1954 1976 20-42 3298 13941 12364 2174 3771 624 98 2297 1402 293 1383 32 21 121 328 240 73 .305 .374 .555 .928 *9783D/45 MLN-ATL-MIL
3 Babe Ruth 714 1914 1935 19-40 2503 10620 8399 2174 2873 506 136 2213 2062 1330 43 113 2 123 117 .342 .474 .690 1.164 971/83 BOS-NYY-BSN
4 Willie Mays 660 1951 1973 20-42 2992 12496 10881 2062 3283 523 140 1903 1464 192 1526 44 13 91 251 338 103 .302 .384 .557 .941 *8/39675 NYG-SFG-TOT-NYM
Provided by Baseball-Reference.com: View Play Index Tool Used
Generated 1/14/2013.

Sunday, January 6, 2013
Home Run Proficiency Career

In a future post I'll take the percentage difference per season from their career number for the top career HR hitters to look for trends such as improvement late in a career and will create graphs.
_________________________________________________

This is the first swipe.  Click this link to view Home Run Proficiency data for each season for batters with at least 493 career home runs (HR).  There are four tabs with that data.  Then there are two tabs with data and graphs for the four batters with the most career HR listed above.  Their data is aligned by age, figured simply as season year minus birth year, not using June 30 as a mid season break point as baseball-reference.com does.  So some ages might not line up as they do in that website.  For instance Bonds was born July 24, 1964, Aaron February 5, 1934.  baseball-reference.com shows Bonds a year younger than I do.

So far I have graphs for the big four with their Home Run Proficiency v. the league, which have been labeling x and now also that data v. each of their individual career Home Run Proficiency numbers previously labeled y.

1. I have no means to apply a HR ball park factor, so that should be considered when evaluating this data.

2. I did not remove each season's data from the batter's career, which would have provided more accuracy but added yet another layer and I needed to wrap it up.  It probably skews Ruth's data the most but he's so far removed from the others in every measurement that it probably doesn't matter that much.

If I ever figure out how to copy Google Docs spreadsheet data into its blogger creation software then I can show some of it more neatly then currently.  So view the data using the link mentioned above.  Here is a sloppy form:

Age Bonds Aaron Mays Ruth
20 -97.03% -45.83% 30.18%
21 -69.81% -69.62% -31.55%
22 -63.07% -70.92% -48.57%
23 -64.24% 2.00% 20.14% 60.19%
24 -28.70% -51.20% 32.43% 37.19%
25 -68.04% -20.03% -21.89% 85.92%
26 -2.31% 10.85% -19.02% 28.22%
27 -31.34% -37.97% -50.72% -18.80%
28 53.39% 20.39% -20.44% -8.97%
29 32.58% 36.03% -33.36% 19.16%
30 33.81% -42.50% 0.82% -38.91%
31 -25.36% -14.89% 39.19% 19.79%
32 2.18% 22.01% 28.96% 42.70%
33 -6.73% 42.27% 87.91% 11.78%
34 -27.29% 23.14% 102.13% -23.49%
35 7.11% 63.67% 15.93% -30.85%
36 11.36% 19.32% -14.36% -23.34%
37 99.43% 123.83% 26.22% -38.93%
38 58.41% 57.76% -70.24% -43.16%
39 53.04% 110.20% -11.06% -63.62%
40 52.30% 26.83% -28.28% -42.50%
41 67.04% -90.66% -64.90%
42 -33.26% -28.40% -85.02%
43 -5.25%

Age Bonds Aaron Mays Ruth

Career 1.8391 1.6363 1.5016 7.8412
Bonds Aaron Mays Ruth

Aaron started playing in Atlanta at age 32.  Bonds and Aaron at age 37 both have their highest Home Run Proficiency v. their own careers.  Ruth and Mays decline as one would expect.  Aaron has his second highest at age 39, Bonds at age 41.  Mays age 34, Ruth age 25.

What made Bonds and Aaron so different?  In future posts I'll compare them against their contemporaries.  Bonds v. others in the steroid era.  Aaron v. the 500 HR hitters of the 1950s and 1960s.

No comments: