The Other, Other Extreme of 2017
CLEVELAND — If you’ve found your way to this article, it likely means that you’re an educated baseball fan and aware of how certain elements of the game have trended toward the extremes in recent years — in particular, as marked by the home-run and strikeout records of 2017. Much hand-wringing has occurred over the lack of balls in play this season.
But there’s another extreme that’s developed, as well, one that’s received a bit less attention perhaps: the share of innings absorbed by bullpens.
Bullpens have never accounted for as much work as they did in 2017. Relievers combined to throw 16,496.2 innings this year, bettering the previous mark of 15,893.0 set way back in… 2016. Relievers combined to throw over 1,000 innings more than just two years earlier in 2015 (15,184.1) and nearly 3,000 more than in the first year of the 30-team era in 1998 (13,968.2).
To look at it another way, bullpens accounted for a record 38.1% of innings this season — and that rate has continued to inch up in the modern era. In 1959, just 21.3% of innings were pitched in a relief capacity. In 1969, that figure increased to 26.4%, to 28.9% in 1979, and then 33.7% in 1999. It’s a trend myself and others have documented in recent years.
The workhorse starting pitcher is endangered. Only 15 starters reached the 200-inning threshold this season, matching last year’s mark, which is the lowest on record.