Popeye's team, the pirates, would also be the name of Pittsburgh's baseball team.
Popeye uses the term that ain't cricket, an old British term meaning something is unfair or dishonest.
Most of the names used to describe the various pitches were accurate for the era. Dizzy Dean, an unconventional and brash personality, was a star pitcher at the time, and the characters here nod a bit to him.
Popeye grows his own spinach in this short, one of a few times he's show doing so.
One of the few times Bluto is shown as having his own female admirer. The identity of the lady is never given, however.