PHILADELPHIA -- Jim Johnson, whose attacking defenses helped the Philadelphia Eagles to one Super Bowl appearance and five NFC title games, has died. He was 68.

Johnson had taken a leave of absence from the team in May as he continued to battle a cancerous tumor on his spine. The Eagles announced his death on Tuesday afternoon.

Eagles defensive coordinator Jim Johnson had taken a leave of absence from the team in May as he continued to battle a cancerous tumor on his spine. Howard Smith/US Presswire

A veteran of 22 years as an NFL assistant, Johnson was considered one of the top defensive minds in the league, known for complex schemes that confused opponents and pressured the quarterback from every angle. His defenses consistently ranked among the best in the league, including last season, when the Eagles finished third in total defense and fell one victory short of the Super Bowl.

From 2000-08, Johnson's Philadelphia defenses ranked second in the NFL in sacks (390). During his 10-year tenure, the Eagles made the playoffs seven times and he produced 26 Pro Bowl selections.

"This whole Eagles-Andy Reid regime here that's taken place wouldn't have been possible without Jim," said Andy Reid, who hired Johnson to be his defensive coordinator shortly after he got his first head coaching job with the Eagles in 1999.

"I'm not sure there's a person that I've met that isn't a Jim Johnson fan. He really represented everything this city is all about with his toughness and grit. That's the way he fought this cancer."

Eagles chairman Jeffrey Lurie praised Johnson for his leadership skills and the person he was.