Who is Sean Casey and is he on Instagram?

Sean Casey, Department of Chemistry

DJ has had a great second half and he credits Sean Casey for that

Sean Casey (@stcasey34) • Instagram photos and videos

Yankees hire Sean Casey as hitting coach

Sean Casey (@seancaseymp) • Instagram photos and videos

MLB hiatus, pandemic afford Casey a time for reflection

Yankees want Sean Casey back in telling Aaron Boone sign

Sean Casey (@seancasey305) • Instagram photos and videos

Sean Casey (@stcasey34) • Instagram photos and videos

Sean Casey (@themayorsofficemlb) • Instagram photos and videos

Sean Casey (@seancaseymp) • Instagram photos and videos

Sean Casey (@stcasey34) • Instagram photos and videos

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