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Kuechly announced his retirement from the NFL on Tuesday.

The 28-year-old just completed his eighth consecutive season with 100-plus tackles and has been the heart and soul of Carolina's defense, and his retirement certainly comes as a surprise, though his concussion history is well documented. Kuechly received All-Pro honors seven times -- five First Team -- and totaled 1,092 tackles, 12.5 sacks, 18 interceptions and seven forced fumbles in 118 career games, all with the Panthers.

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