The jersey is MLB Authenticated, hologram #FJ143376. Lyon wore this jersey on 10-3-10 when the Houston Astros played the Chicago Cubs. My Lyon pitched the last inning of the season for the Astros and had a strike out. This home red jersey is from Majestic and is a size 52. All letters and numbers are tackle twill stitched on the jersey.Lyon's #37 is on the back and lower left front of the jersey. On the inside seam is the 0062-wash tag which is only on jerseys issued to the team and are not for retail. If you have any questions, please ask.