Custom jersey with everything sewn on, size XL. Hand-signed by Bob Costas (HOF).Bob's known for his long tenure with NBC Sports, from 1980 through 2019. He has received 28 Emmy Awards for his work and was the prime-time host of 12 Olympic Games from 1988 until 2016. He is currently employed by Warner Brothers. Discovery Sports, where he does play-by-play and studio work for the MLB on TBS and commentary on CNN. He is also employed by MLB Network, where he does play-by-play. A little-known fact is that Bob worked for WGN Sports in 1979-80 as the play-by-play voice of the Chicago Bulls. The autograph includes an official Beckett Authentication Services serially numbered hologram for authenticity purposes.Authentication: Beckett Hologram