Pine tar is shown on the back of the jersey of Boston Red Sox

SI 60: Sportsmen Of The Year: The 2004 Boston Red Sox - Sports Illustrated

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Why is Justin Turner's jersey stained

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First look at the authentic Justin Turner jerseys in the Red Sox team store! : r/NLBest

Did Yusei Kikuchi use pine tar? Aaron Boone says Yankees 'looked at it' and will handle 'behind the scenes' - Newsday

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George Brett: Pine Tar Incident, Large - MLB - Blue - Sports Fan Gear | breakingt

Boston Red Sox Custom Name Number Alternate Baseball Jersey Navy - Malcom Terry

A.J. Hinch on videos alleging Red Sox reliever of cheating: 'Not something that's crossed my mind

MLB Reportedly Cracking Down on Pitchers Using Foreign Substances - On Tap Sports Net