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Billy Butler and the best young hitters in baseball

Jul 3, 2009, 2:52 PM EDT

Zack Greinke has obviously been the big story for the Royals this year, but Sam Mellinger of the Kansas City Star notes
that Billy Butler is at least giving fans a second reason for optimism
while the team tries to avoid losing 90-plus games for the eighth time
in a dozen seasons:

Billy Butler, barely 23 years old, is showing some real signs of
turning into the first legitimate middle-of-the-order hitter the Royals
have developed since, what, Sweeney? Four hits yesterday, including two
doubles, raised his line to .293/.344/.449. … Since June 10–we’re
talking 18 starts and 81 plate appearances, roughly one-eighth of a
season–Billy is hitting .333/.370/.520, with five doubles, three
homers and nine RBIs.

Butler was one of my “breakout” picks this season, so I’m happy to see
him thriving after the Royals demoted him to the minors following a
slow start last year. He hit .336/.416/.561 in the minors despite being
extremely young for every level, never posting a batting average below
.290 at any stop, so it was only a matter of time before Butler started
knocking around big-league pitchers too.

Mellinger’s blurb about Butler got me curious about how well his
production compares to other 23-year-olds and in the bigger picture how
well various other young hitters are faring this season. With that in
mind–and with the help of utterly indispensable
Baseball-Reference.com–here’s a look at how the youngest hitters in
baseball are doing in 2009, broken down by age group:

20-YEAR-OLDS         PA      AVG      OBP      SLG     OPS+
Elvis Andrus 232 .269 .330 .380 87

I’ve set the cutoff for this little study at 200 plate appearances,
but Elvis Andrus is actually the only 20-year-old hitter in all of
baseball with even 100 trips to the plate this season. In fact,
Fernando Martinez of the Mets is the only other 20-year-old to bat at
all this year unless you count Tigers starter Rick Porcello’s work at
the plate during interleague play.

While not especially productive Andrus has certainly held his own at
the plate, which is an extremely promising sign from a 20-year-old
shortstop who didn’t do a whole lot of hitting in the minors. Andrus
has been fantastic defensively, rating 5.3 runs above average in 65
games according to Ultimate Zone Rating, so even slight improvements
offensively would make him an All-Star-caliber player.

21-YEAR-OLDS         PA      AVG      OBP      SLG     OPS+
Justin Upton 315 .309 .387 .558 141

I’ve been fawning over Justin Upton in this space all season,
so it shouldn’t surprise you to learn that he’s a) the only 21-year-old
with more than 200 plate appearances and b) knocking the cover off the
ball. Upton currently has the 18th-best adjusted OPS+ of all time for a
21-year-old, with Mickey Mantle and Hank Aaron tied for the spot above
him. He’s on pace to hit .309 with 30 homers, 40 doubles, 75 walks, and
20 steals, and has also been outstanding defensively in right field.
Stud.

22-YEAR-OLDS         PA      AVG      OBP      SLG     OPS+
Pablo Sandoval 298 .327 .379 .548 142
Colby Rasmus 256 .271 .313 .453 102
Jay Bruce 308 .215 .295 .458 94

Pablo Sandoval has quickly become one of my favorite players,
because the man they call “Fat Ichiro” or “Kung Fu Panda” has hit .327
with a .548 slugging percentage despite swinging at everything and running the bases like he’s jonesing for a piece of cake. Combined with his 41-game debut last season Sandoval has hit .333/.372/.528 through 452 plate appearances in the majors.

23-YEAR-OLDS         PA      AVG      OBP      SLG     OPS+
Evan Longoria 316 .297 .377 .558 139
Adam Jones 310 .300 .355 .502 120
Billy Butler 303 .289 .340 .443 107
Asdrubal Cabrera 243 .307 .364 .417 103
Dexter Fowler 293 .250 .340 .381 87
Chris Davis 270 .203 .259 .422 76

This is Butler’s age group and as you can see he fares pretty well,
ranking third in adjusted OPS+ behind only Evan Longoria and Adam
Jones, although he’s also been less valuable than Asdrubal Cabrera once
defense is factored in. Longoria has been one of the most valuable players in the league through three months, while Jones currently has the 27th-best adjusted OPS+ ever for a 23-year-old center fielder.

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