This black Mets cap was worn by Tom Glavine in 2007. His number "47" is written inside. There are numerous style matches for this hat on Getty Images for the 2007 season.

The game use is authenticated by Steiner. Note that the LOA is slightly wrinkled. 

Glavine game used items authenticated by Steiner are difficult to find. Glavine is a first ballot HOFer, receiving a phenomenal 91.9% of the vote.