Walker was everyone’s favorite sleeper after a successful 2017, but injuries have caused him major issues over the last two seasons. Still a free agent at the time of this writing, his fastball has been a plus pitch throughout his career. He fanned 96 batters with the heater all the way back in 2017.
The splitter has never been a terribly reliable pitch for Walker. It has a -15.7 pVAL over the course of his unique career.
Walker threw his four-seamer 54.7% of the time in 2017. And it was his predominant offering in 2018, too, at 65.2% across his 16 innings. In 2017, Walker’s four-seamer had a 20.8% whiff rate and was a very effective pitch with a 10.6 pVal.
Similar to his curve, Walker’s split is featured noticeably more against lefties. It had a fairly modest whiff rate of 18.8% in 2017 while allowing a .340 wOBA to opposing hitters. Overall, it was a negative pitch with a poor -5.1 pVal in 2017.
The curve is Walker’s fourth pitch by percent thrown at just 12.5% in 2017. The majority of his curves were thrown to lefties. The results were good in 2017 with a 34.6% whiff rate and .300 wOBA allowed.
The ex-Mariner only threw 16 innings last year, so the small-sample-size caveat applies here. Judging more so by 2017’s numbers, Walker’s cutter isn’t a particularly great swing-and-miss pitc, as it had a whiff rate of 19.9%. It was effective overall in 2017, as it limited hitters to just a .280 wOBA.