This seemed worth more than a comment, so I’m posting a thread about it.
FanGraphs had a promising comment about Jameson Taillon. It came in an article about the ten biggest swinging strike rate gainers of 2018, a list on which Taillon placed tenth:
Jameson Taillon, Pirates | 2.5% to 11%: A new slider not only aided a career-best 23% K rate, but also has me excited for a potentially elite season from the 27-year old righty. From late-May on, he threw it 25% of the time and had a 5.