He is best known for his role in The Texas Chain Saw Massacre (1974) and Texas Chainsaw 3D (2013) as Grandpa Sawyer. He also did a cameo as a police man at the end of Texas Chainsaw Massacre: The Next Generation (1994).
John took time off away from the public and the cameras until the 2000s, when he started making appearances and acting in independent films again.
John has starred in numerous films with Horror Wasteland Pictures International .He played Dr.Harper in Bobby Easleys adaptation of Stephen Kings The Boogeyman(2014) and All Sinners Night. (2014). 2015 starred in Tony Moran's biopic Horror Icon: Inside Michael’s Mask with Tony Moran. John also plays the iconic Col. Talaska in Horror Wasteland Pictures WW2 stop-motion film The Devil Dogs of Kilo Company (2016) and as Grandpa McCormick in the horror-western Belly Timber (2016)