 In 1975, Lineback joined the Colony Theatre Company in Burbank, and was in the cast of the play "The Grass Harp".He appeared in many stage roles, including those of Eugene Gant in "Look Homeward, Angel"; Tom Joad in "The Grapes of Wrath"; C.C.Showers in "The Diviners", for which he won the Drama-Logue Award for Outstanding Actor; Dan White in "Execution of Justice"; and the title role in "Mister Roberts".