MLB Prospect Graded Cards › 2024 Bowman Chrome Brock Wilken /250 purple Auto SGC 10/9.5 Image 1 of 2 Image 2 of 2 2024 Bowman Chrome Brock Wilken /250 purple Auto SGC 10/9.5 $325.00 2024 Bowman Chrome prospect #CAP-BW Brock Wilken 106/250 purple Refractor Auto SGC 10/9.5. Add To Cart Added! 2024 Bowman Chrome prospect #CAP-BW Brock Wilken 106/250 purple Refractor Auto SGC 10/9.5.