Jonathan Loaisiga

The changeup was an ineffective pitch for Loaisiga in 2019, likely owing to a minimal 7 mph velocity gap between it and the fastball. There is still potential there—the pitch yielded a minimal 10.0% fly-ball rate and weak contact, so there’s a possibility it can yet become a weapon for him as it was in the minors.

The curveball was Loaisiga’s best pitch in 2019, with a 4.2 pVAL created off of a 37.2% K rate and 20.3% swinging-strike rate. Zero home runs off of the pitch in 2019—despite a 50.0% fly-ball rate—suggests that may not be sustainable.

Loaisiga can chuck it, reaching upwards of 99.8 on the gun in 2019. Still, hitters feasted for a .472 WOBA and 211 wRC+ on the heat, including five home runs on minimal swinging-strike and K rates.

Loaisiga had an average fastball at best last season. Batters hit .306/433/.490 off the pitch, though that came with a .361 BABIP. It does have good velocity and movement, so while it does have some potential he will need to limit the good contact.

The slider showed promising signs in 2018. It held a solid 18.1% swinging-strike rate and a 41% outside swing rate. It did a good job keeping balls on the ground, while holding hitters to a .257 BAA.

Loaisiga’s changeup was his third pitch, but the results show it should have been used more. It held a crazy 27.3% swinging-strike rate, while holding hitters to a .167 BAA. It did not allow any fly balls, keeping mainly everything on the ground.

The curve was rarely thrown at only 4% of the time. It is a non-factor in his arsenal at this time.