Is "Rocky" (1976) left-handed?

In the famous boxing saga, Rocky Balboa, played by Sylvester Stallone, is sometimes portrayed as a left-handed boxer, which is used as a strategic element in some fights. However, the depiction is not consistent across all films in the series.

In the film "The Princess Bride" (1987), left-handedness is used as an element of surprise

There is a famous fencing scene in this film in which both the protagonist Westley (aka the Man in Black) and Inigo Montoya initially pretend to fence right-handed before both revealing that they are actually left-handed. This revelation serves as a surprising turning point in their duel.