The changeup is Detwiler’s primary offspeed offering. It is used to generate ground balls which it did 60% of the time in 2019, but was not successful at getting swings and misses. With a decent 37% O-Swing, Detwiler should look to decrease the pitch’s zone rate, which sat near 50% in 2019.
The curveball is the only pitch in Detwiler’s arsenal that allowed a wRC+ of under 100 (at 73) in 2019. It’s Detwiler’s only swing-and-miss pitch with a 36.8% strikeout rate last season. Even still, its SwStr% was essentially league-average. Detwiler will need to utilize this pitch more frequently in 2020 in order to improve on his poor 2019.
Detwiler really embraced a fastball-heavy approach, but uses three different grips. He throws his four-seamer, sinker, and cutter. Those three pitches combine for 70% of his arsenal. His four-seamer and sinker sit between 90-92 mph. Both induce below-average whiffs and the sinker is used strictly to generate ground balls. Neither fastball generated positive results, and were crushed when put in the air, as evidenced by a 20+% HR/FB rate for each pitch.
Detwiler introduced a cutter to his repertoire in 2019, and it did not perform well, earning a -3.3 pVAl per 100 thrown. It generated a SwStr% of only 6.2%. Detwiler does not have the velocity to carry fastball usage of 70% and should look into increasing his secondary offerings.