Fangraphs had up an article today on Broxton and his newly added cutter
Broxton’s overall whiff rates exhibited an acute post-cutter rise, spiking to 11.6 percent after he managed just a 6.4 percent mark in Kansas City. His improved control put him in the position to make the whiffs count.
The cutter appears to be the main driver, particularly against right-handed hitters. He went with it on the first pitch over 50 percent of the time from September on, and the minuscule 23.1 percent ball rate routinely put hitters in unfavorable counts. The post-cutter difference is clear:
More at the link, but it is certainly interesting.