2011 Bowman Platinum Prospect Autograph Red Refractor #BPA-BH Bryce Harper Rookie Autograph. Red premium insert for Bowman's popular Platinum Prospect set features a limited run with this card numbered 6/10, with large autograph grading a perfect 10 from BGS along with an EX-MT 6 grade for the card. Considered one of the elite players in the sport today, Harper set the tone in his very first season, becoming the youngest player ever to appear as a position player in an All-Star Game at the young age of 19 in 2012.