DALLAS – Frank Cornish IV, an offensive lineman on two of the Dallas Cowboys' Super Bowl champion teams in the 1990s, died over the weekend at age 40.

Cornish was pronounced dead Saturday morning at a Grapevine hospital, where he was taken from his home in nearby Southlake. His death was caused by heart disease, the Tarrant County Medical Examiner's office found.

Cornish played in the NFL for six years and was a backup with the Cowboys in the 1992 and 1993 seasons, when they won Super Bowls. He started five games for Dallas those years.

He was drafted in the sixth round by the San Diego Chargers in 1990 and also played for the Minnesota Vikings, Jacksonville Jaguars and Philadelphia Eagles.

"The Bruin family sends our deepest, heartfelt sympathy to the Cornish family," Rick Neuheisel, a UCLA assistant for most of Cornish's college career, said in a statement. "Frank was a great guy in the locker room and a huge personality and a fun guy to be around."

Cornish's father, Frank Cornish III, was a defensive lineman in the NFL in the late '60s and '70s.

The younger Cornish is survived by his wife, Robin, and their five children.

Frank Edgar Cornish