Balk during full windup?

[yawetag]

Originally Posted by SanDiegoSteve

It is perfectly legal, and this type of delivery with the extra pump was used extensively by pitchers back in the 30s and 40s, as is evidenced on old films.

To be fair, though, a lot of what pitchers did in the 30s and 40s is illegal now.

[MrUmpire]

Originally Posted by yawetag

To be fair, though, a lot of what pitchers did in the 30s and 40s is illegal now.

Not a lot.

8.05 (a), (c), (e), (f), (g), (h), (i), (k), (l) go back to the late 1800's. (b) goes back to 1900 and (b) to 1920.

(d) was adopted in the 1940's and modified in 1950. The complete stop was inserted in 1950 and in 1964 the one-second requirement was dropped.

So, most of what we have today, we've had for a very long time.