GUU Auction stated the following about this: This red home St. Louis Cardinals cap was worn by Albert Pujols during St. Louis 2006 championship season when the Cardinals won their first world title since 1982. Signed neatly on the brim by Pujols, this cap comes with a letter of authenticity from the Pujols Family Foundation (pictured above), also signed by Pujols himself. This New Era size 7 cap exhibits moderate evidence of game use, and has Alberts #5 written in black marker under the brim. If you are chasing a piece of Pujols game used memorabilia with rock solid provenance, look no further.
Pujols items from the 2006 Championship season are extremely scarce and this is the first Pujols cap from that season with Pujols Foundation letter and hologram that we can remember seeing.