The name of the actor is a parody of Chuck Norris and Arnold Schwarzenegger.
Grand Theft Auto III
The actor appears to be a relatively high man and wears a blue suit. If the one looks closely, they can spot a beard, just like Chuck Norris has.
Grand Theft Auto: San Andreas
If the one listens closely to some pedestrians, they can hear that the pedestrian saw Schwartz and his Half-Cock jogging near his house in Vinewood. This is actually a reference to the film he starred in, although this shouldn't even be possible, because GTA San Andreas is set in 1992, while film is being advertised in 2001, the year, in which GTA III is set.