Buck Showalter didn't know what 'Seinfeld' was before his 1994 cameo
Seinfeld and Sports - Sports Illustrated
George Steinbrenner – Society for American Baseball Research
In Buck they trusted, and now Orioles fans lament Showalter's leaving
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Buck Showalter says Seinfeld cameo cost him money
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1994 'Seinfeld' cameo still costing Mets manager Buck Showalter
Jonas Shaffer - Baltimore Sun
In Buck they trusted, and now Orioles fans lament Showalter's leaving