Adjective
off-speed (not comparable)
(baseball) Being a pitch thrown at a slower speed than a fastball, such as a change-up.
If pitchers can execute their sliders and off-speed stuff low and away, odds are Stanton and most other hitters will swing right through it. Source: Internet
I would like to work more on my off-speed pitches, my change-up and curveball. Source: Internet
However, we found that LHPs generally have had spin rates on their pitches, both fastballs and off-speed pitches. Source: Internet
The off-speed will come, once he gets comfortable being on the mound. Source: Internet