Adelaide defender Sam Shaw has been forced into retirement due to ongoing concussion symptoms, according to the Adelaide Advertiser.
The 25-year-old played 24 games for the Crows after being recruited with pick 45 in the 2009 National Draft.
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Shaw did not play a senior game in 2016, after suffering a head knock against Woodville-West Torrens in the SANFL in April this year.
He was sidelined for four months, before returning to the SANFL in Round 18. However, following the match he suffered more concussion related symptoms and subsequently ruled out for the rest of the season.
Shaw is reportedly still battles lethargy and fatigue during and after strenuous exercise.