![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://pbs.twimg.com/media/F8zUNY1XUAA0CAB.jpg)
BreakingT (@BreakingT) / X
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://www.si.com/.image/ar_1:1%2Cc_fill%2Ccs_srgb%2Cfl_progressive%2Cq_auto:good%2Cw_1200/MjAxNDU3MjQ5NzM2OTkyMzA5/usatsi_21634908.jpg)
Philadelphia Phillies Troll Orlando Arcia After Crushing Atlanta
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://cloudfront-us-east-1.images.arcpublishing.com/advancelocal/NOKUVJFRTJDJZCS63T2SXT534M.jpg)
Atta-boy, Harper!' Where to get the Bryce Harper Philadelphia
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://nypost.com/wp-content/uploads/sites/2/2023/10/newspress-collage-jez6jm6wx-1697236097235.jpg?quality=75&strip=all&1697221793)
Bryce Harper reveals why he feels no pressure in the playoffs
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://www.tiktok.com/api/img/?itemId=7288842918624759071&location=0&aid=1988)
Atta boy harper shirt the player was wearing|TikTok Search
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://nypost.com/wp-content/uploads/sites/2/2023/10/NLDS_Braves_Phillies_Baseball_46121-d5dd7.jpg)
Phillies troll Braves, Orlando Arcia with 'Atta boy Harper' T-shirt
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://eletees.com/wp-content/uploads/2023/10/Bryce-Harper-Coach-Prime-Shirt-1-1.jpg)
Bryce Harper Coach Prime Shirt: The Viral Entrance at Citizens
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://www.tiktok.com/api/img/?itemId=7289079741070675246&location=0&aid=1988)
Ha ha attaboy harper|TikTok Search
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://nypost.com/wp-content/uploads/sites/2/2023/10/2023-10-13T035800Z_233481952_MT1USATODAY21634975_RTRMADP_3_MLB-NLDS-ATLANTA-BRAVES-AT-PHILADELPHIA-P.jpg)
Phillies troll Braves, Orlando Arcia with 'Atta boy Harper' T-shirt
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://www.tiktok.com/api/img/?itemId=7288367719295044910&location=0&aid=1988)
Braves shortstop Orlando Arcia was talking smack last night after
![MLB playoffs: The story behind the viral 'Atta Boy Harper' shirt](https://i.ytimg.com/vi/i5xq0VaG8GA/maxresdefault.jpg)
Bryce Harper Responds to Orlando Arcia Atta Boy Comments