Former NFL player Keith Browner Sr. Death at age 63

Keith Browner Sr.a standout football player at the University of Southern California who played five seasons in the NFL is dead… TMZ Sports has learned.

Keith died Tuesday morning in San Leandro, CA…according to his son: Keith Browner Jr.

We’re told Keith’s death was unexpected and sudden… and the family is in shock.

The cause of death is unclear, but we’re told it appears he suffered a heart attack.

Keith Jr. says he talked to his father Monday night and he was having stomach problems, vomiting, feeling tired and said he was going to the hospital Tuesday morning.

We’re told Keith Sr. was getting up Tuesday morning to get ready to go to the hospital for a check-up when he curled over the edge of a chair and fell to the floor next to his girlfriend.

Keith played on the USC defense in the 1980s and was drafted with the 30th overall pick in the 1984 NFL Draft by the Tampa Bay Buccaneers.

He played linebacker and defensive end in college and the NFL, eventually playing five seasons between the Bucs, San Francisco 49ers, Oakland Raiders and San Diego Chargers from 1984 to 1988.

Keith’s son played college football at Cal as a defensive end and spent four years in the NFL with the Houston Texans and Chicago Bears.

He is survived by his five children…Keith Jr. and daughters Keicha, Amber, AshleyAnd Jordan.

Kees was 63.