Former All-Pro linebacker Junior Seau died of an apparent self-inflicted gunshot wound to the chest, Oceanside (Calif.) police told reporters outside his home Wednesday.

“Mr. Seau has deceased,” Oceanside police chief Frank McCoy said during a news conference. “This case, at this point, is being investigated as a suicide, and a handgun was found by the body."

Police responded to Seau’s home after a woman who identified herself as his girlfriend alerted police around 9:30 a.m. PT. Emergency workers were unable to resuscitate Seau, who was found in a bedroom.

Seau was 43.

He played for three teams in his 20 NFL seasons — the San Diego Chargers (1990-2002), Miami Dolphins (2003-05) and New England Patriots (2006-09).

Junior Seau

LOSS OF A LEGEND

"Everyone at the Chargers is in complete shock and disbelief right now,” the Chargers organization said in a statement. “We ask everyone to stop what they're doing and send their prayers to Junior and his family."