Many years ago, while exploring ways Japanese ball varied from the major league variety, I noticed that in Nippon Professional Baseball, triples declined in the second half of the season, while in the majors they increase slightly. Despite fewer games played over a longer season with a less arduous travel schedule, a lot of Japanese players look gassed in the second half.

Take Kosuke Fukudome. Back in his heyday with the Chunichi Dragons, running on the right fielder’s arm in April was a risky proposition. But three months into the season, runners would go from first to third with impunity on balls hit to right field. Considering the long practice schedule on off days and the two or more hours of practice before each game, it’s no wonder.

With the magic of the internet comes better access to potential sources of answers, and you know what? While the batting average on balls in play increases in the second half of the season — regardless which side of the Pacific you are on, the frequency of batters reaching third on those hits still decreases in the second half.

Splitting the season between June 30 and July 1, NPB teams since 2006 have hit triples on 1.73 percent of first-half hits, and 1.6 percent of second-half hits. In the majors, using the All-Star break from mlb.com as a convenient break point, MLB teams since 2006 increased from 2 percent in the first half to 2.1 percent in the second half.

I did a story for Kyodo News last month about the conditioning programs of the SoftBank Hawks and Yakult Swallows, the two teams that met in the Japan Series after beating up their leagues in the second half. It’s a small sample size, but the Hawks and Swallows were both below average in triples in the first half but well ahead of their leagues in the second.

Remembering Fukudome, I wondered if outfield assists followed a similar pattern. For NPB as a whole, outfield assists decreased in the second half this year, the first year I have kept regular fielding totals during the season. Hawks outfielders threw out eight runners in the first half, 10 in the second half, while the Swallows declined from 16 to 10.