![Best of BP: 1,000 Grounders: What We Still Don't Know About First Base Defense - Baseball ProspectusBaseball Prospectus Best of BP: 1,000 Grounders: What We Still Don't Know About First Base Defense - Baseball ProspectusBaseball Prospectus](https://www.baseballprospectus.com/wp-content/uploads/2021/04/USATSI_12913917_168392253_lowres-1000x714.jpg)
Best of BP: 1,000 Grounders: What We Still Don't Know About First Base Defense - Baseball ProspectusBaseball Prospectus
![Phillies' Bryce Harper is preparing to play first base in 2023: Inside the team's 'full go' plan - The Athletic Phillies' Bryce Harper is preparing to play first base in 2023: Inside the team's 'full go' plan - The Athletic](https://cdn.theathletic.com/app/uploads/2023/04/12183527/GettyImages-1251751069-1024x682.jpg)
Phillies' Bryce Harper is preparing to play first base in 2023: Inside the team's 'full go' plan - The Athletic
![Photo libre de droit de Première Base banque d'images et plus d'images libres de droit de Première base - Première base, Base de base-ball, Baseball - iStock Photo libre de droit de Première Base banque d'images et plus d'images libres de droit de Première base - Première base, Base de base-ball, Baseball - iStock](https://media.istockphoto.com/id/513672048/fr/photo/premi%C3%A8re-base.jpg?s=612x612&w=0&k=20&c=KmmvRoMkSGWSckByrRgNB-6_EvtuxDj6Q5_tHpNYIx8=)
Photo libre de droit de Première Base banque d'images et plus d'images libres de droit de Première base - Première base, Base de base-ball, Baseball - iStock
![Pick-off Throw To First Base ….ohhhh, and the ball is down the right field line : ( — Baseball Positive Pick-off Throw To First Base ….ohhhh, and the ball is down the right field line : ( — Baseball Positive](https://images.squarespace-cdn.com/content/v1/530523b9e4b00af361a0c61c/1601346502783-SIG4K54SP6R5D6XX0ZZC/First+Base+Pick+off+attempt.png)
Pick-off Throw To First Base ….ohhhh, and the ball is down the right field line : ( — Baseball Positive
![Concussion forces Joe Mauer to switch from catcher to first base » AaronGleeman.com » Aaron Gleeman's Baseball and Minnesota Twins Blog Concussion forces Joe Mauer to switch from catcher to first base » AaronGleeman.com » Aaron Gleeman's Baseball and Minnesota Twins Blog](http://aarongleeman.com/wp-content/uploads/2013/08/joe-mauer-first-base-e1377565866271.jpg)
Concussion forces Joe Mauer to switch from catcher to first base » AaronGleeman.com » Aaron Gleeman's Baseball and Minnesota Twins Blog
![MLB Player Rankings for the Top 25 First Basemen of 2021 Season | News, Scores, Highlights, Stats, and Rumors | Bleacher Report MLB Player Rankings for the Top 25 First Basemen of 2021 Season | News, Scores, Highlights, Stats, and Rumors | Bleacher Report](https://img.bleacherreport.net/img/slides/photos/004/482/137/6b9dc2f370fb030e9026199167a4f23b_crop_exact.jpg?w=2975&h=2048&q=85)
MLB Player Rankings for the Top 25 First Basemen of 2021 Season | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
![First Base Footwork Drills - Fundamentals of First Base Series by IMG Academy Baseball (2 of 4) - YouTube First Base Footwork Drills - Fundamentals of First Base Series by IMG Academy Baseball (2 of 4) - YouTube](https://i.ytimg.com/vi/QR2QWQTHp-s/maxresdefault.jpg)