![Griffey Jr. hits milestone](https://www.gainesville.com/gcdn/authoring/2004/06/21/NTGS/ghows-LK-de43604f-cc50-4b31-8d1b-6c2fbd83c285-f38e81e6.jpeg?width=1200&disable=upscale&format=pjpg&auto=webp)
The 500 club
![Griffey Jr. hits milestone](https://images.forwardcdn.com/image/1300x/center/images/cropped/kinsler-082908-1425726286.jpg)
Slugger Hits Home Run Milestone – The Forward
![Griffey Jr. hits milestone](https://cdn.theathletic.com/app/uploads/2023/08/31104940/GettyImages-1635594037-scaled.jpg)
What matters most to MLB players, the New York youth movement
![Griffey Jr. hits milestone](https://i.ebayimg.com/images/g/hwIAAOSwIpxixycQ/s-l1600.jpg)
1999 Finest Milestones Ken Griffey Jr. with Coating PSA 8 776/3000
![Griffey Jr. hits milestone](https://thumb.spokesman.com/gCL98m9tZ3yyL_KxpKEECWixYyA=/2500x1405/smart/media.spokesman.com/photos/2004/06/21/spt21griffey_06-21-2004_Q51SCAC.jpg)
Griffey joins the club
![Griffey Jr. hits milestone](https://wehco.media.clients.ellingtoncms.com/img/photos/2023/04/09/arenado_t800.jpg?90232451fbcadccc64a17de7521d859a8f88077d)
Arenado hits milestone homer as Cards blank Brewers
![Griffey Jr. hits milestone](https://i.ytimg.com/vi/Q6VjGeO_7Ho/sddefault.jpg)
KEN GRIFFEY JR.'S MILESTONE HOME RUNS! (From his 1st to his 600th
![Griffey Jr. hits milestone](https://m.media-amazon.com/images/I/61xQcESbj4L._UF1000,1000_QL80_.jpg)
2001 SP Game Bat Milestone - CINCINNATI REDS Team Set
![Griffey Jr. hits milestone](https://npr.brightspotcdn.com/dims4/default/26ccc47/2147483647/strip/true/crop/140x119+0+0/resize/880x748!/quality/90/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2Flegacy%2Fsites%2Fkwmu%2Ffiles%2F1585922-1347623696.jpg)
Griffey Smacks 500th Home Run in Game at Busch
![Griffey Jr. hits milestone](https://miro.medium.com/v2/resize:fit:1400/1*AFmnN3qD1-CHkcy10J8Fgg.jpeg)
FriarNotes: 8 milestones reached by Fernando Tatis Jr. Saturday
![Griffey Jr. hits milestone](https://bloximages.chicago2.vip.townnews.com/pantagraph.com/content/tncms/assets/v3/editorial/e/4a/e4a553b2-6eb1-11df-9e5c-001cc4c002e0/e4a553b2-6eb1-11df-9e5c-001cc4c002e0.image.jpg)
Ken Griffey Jr. retires at age 40
![Griffey Jr. hits milestone](https://cdn11.bigcommerce.com/s-wqhtgqbco9/images/stencil/1280x1280/products/4335/11660/kgft2__08882.1643819916.jpg?c=2?imbypass=on)
Ken Griffey Jr. Cincinnati Reds 2005 Finest Card 66
![Griffey Jr. hits milestone](https://img.mlbstatic.com/mlb-images/image/private/t_16x9/t_w1024/v1586379500/mlb/sry1meyxlezrxc5e3cft)
Ken Griffey Jr. hits 400th career home run
![Griffey Jr. hits milestone](https://i.ytimg.com/vi/qNupCPlRoHY/maxresdefault.jpg)
Milestone Ken Griffey Jr. has the Smoothest Swing: MLB The Show 21
![Griffey Jr. hits milestone](https://sabr.org/sites/default/files/Griffey-Ken-Jr-CIN-NBHOF.png)
April 10, 2000: Ken Griffey Jr. becomes youngest player to hit 400