The Month of the Splitter

The year of the splitter has come and gone. Actually, those of us who follow these things closely know that both 2023 and 2024 were considered the years of the splitter, and then we established back in March that 2025 would be the year of the kick change. While major league pitchers ran a 3.3% splitter rate in 2025, the highest mark since the pitch tracking era started in 2008, that represented a jump of just 0.21 percentage points from 2024. It’s a difference of less than one splitter per team every three games. While the number is still going up, the big increases came in 2023 and 2024, and the pace fell off this year.

That graph makes it official. This isn’t the year of the splitter. But now let me add another line to that graph. That was the regular season. We’re in the thick of the playoffs, so let’s throw the postseason in the mix, too. If you saw that first graph and wondered why I left all that empty space at the top, well, now you know.

That’s more like it. October 2025 has seen a splitter explosion. The red line is always going to be more volatile than the blue line because the postseason is such a small sample, but even so, the playoffs have seen a 6.6% splitter rate. That’s not just the highest we’ve ever seen. It’s twice the rate for any regular season or postseason in the past 23 years. Maybe 2025 was the year of the kick change, but October 2025 is very definitely shaping up to be the month of the splitter. The playoffs aren’t even over, and we’ve already seen more splitters this October than in the postseasons of 2023 and 2024 combined. Read the rest of this entry »








