Shortstop throws warmup pitch

[Dave Reed]

No, in FED, he isn't a pitcher. 3-3-1:
..... Should there be no announcement of substitutions, a substitute has entered the game when the ball is live and:
a. a runner takes the place of a runner he has replaced,
b. a pitcher takes his place on the pitcher’s plate,
c. a fielder reaches the position usually occupied by the fielder he has
replaced, or
d. a batter takes his place in the batter’s box.

He's still the shortstop.