Question:
Search the web and find a definition of the onbase percentage
(OBP). Find statistics on the components
of the onbase percentage for Miguel Cabrera.
Based on this data calculate Miguel Cabrera’s onbase percentage.
Answer:
The formula for onbased percentage is
OBP=(H+BB+HBP)/(AB+BB+HBP+SF)
Where:
H is the
number of hits,
BB is the
number of base on balls,
HBP is the
number of times a hitter is hit by the pitch,
AB is at
bats,
SF is
sacrifice flies.
Many
baseball statistic web sites have information on hits, bases on balls, and at
bats.
From the MLB
site I found that Miguel Cabrera in 2012 had 622 at bats, 205 hits, and 66
walks. The MLB site does not appear to
have information on times hit by pitch or the number of sacrifice flies.
I was able
to find some information on the number of times a player was hit by a pitch at http://www.teamrankings.com/mlb/playerstat/hitbypitch
Miguel Cabrera was hit by a
pitch 4 times during the 2012 regular season.
I was not able
to get information on the number of sacrifice flies.
Instead of
calculating the official OBP I calculate a modified onbase percentage OBPM,
which omits information on sacrifice flies.
OBPM=(H+BB+HBP)/(AB+BB+HBP)
Plugging
numbers from the chart below into the OBPM formula we get
OBPM=(205+66+4)/(622+66+4)
Or
OBPM=275/692.=0.397
The official
onbase percentage OBP, which incorporates information on the number of sacrifice
flies is 0.393. For extra credit
calculate the number of sacrifice flies.
Miguel Cabrera Hitting
Statistics 2012


Games played

161

At Bats

622

Runs

109

Hits

205

Doubles

40

Triples

0

Homers

44

RBIs

139

Walks

66

Strike Out

98

Stolen Bases

4

Caught Stealing

1

Hit by Pitch

4

Sacrifice fly

?

On Base Percentage

?

Slugging Percentage

?

Also, you
may want to look at this onbase percentage calculator on the web.
I think
tomorrow’s problem will look at the slugging percentage.
Enjoy!!!
????
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