When the leadoff batter for
an inning reaches first base, his team’s run expectancy becomes .86 runs. If he
makes an out, it drops to just .26. That’s a huge swing and teams face this situation nine times each game, 162
games per season.
While number one hitters
get the most opportunities in this role, everybody in the lineup receives
numerous chances over the course of the season. For example, Michael Bourn led
off more innings (282) than any Braves batter by far. But that was just 19.6
percent of the team’s total innings. There were 327 Major League players who led
off at least 50 innings in 2012. Most position players – including those
currently arbitration eligible – impacted
their teams in these situations.
So who stood out when leading
off innings last season? None of the top five players in on-base percentage resemble
prototypical leadoff men, but all shined in this role: Joey Votto (.457 OBP),
Travis Hafner (.456), Miguel Cabrera (.456), David Ortiz (.441), and Joe Mauer
(.439).
This data also enables us
to measure how number one hitters perform in these situations, when getting on
base is much more valuable than with one or two outs. The arbitration-eligible Austin
Jackson had a .409 on-base percentage when leading off an inning versus .355 in
all other plate appearances. So when he could
make the greatest impact by reaching base, Jackson excelled.
We can dig deeper in this
analysis as well. Reaching second base
to start innings carries major value – a 1.07 run expectancy. A slugger topped
this group as well. Giancarlo Stanton got to second base (or further) 28 times
in 121 inning leadoff plate appearances. His 23.1 percentage blew away
everybody with at least 50 plate appearances in these spots. Oakland ’s Brandon Moss topped all arbitration-eligible
players. He made it to second in 16.4 percent of his leadoff
plate appearances, seventh best overall in MLB.
This analysis results
from one small shift in thinking. In
arbitration and free agency, such approaches can really pay off.