STAGE

Fresh ‘Tuna’: Joe Sears and Jaston Williams, the original cast and authors of the two-man “Greater Tuna,” left the production at the Westwood Playhouse this week in order to join the cast of an Austin, Tex., production of “A Funny Thing Happened on the Way to the Forum.” John Hawkes has taken over for Williams and Brent Briscoe for Sears. They’ll play the show’s 20 roles during the rest of the “Greater Tuna” run here.