Hernandez had 2 stints with the Cubs with the first coming from 1994-1999. A trade with Colorado brought him back to the Cubs in 2003 where he spent a month with the team before being dealt to Pittsburgh as part of the Aramis Ramirez deal.
I wish I had noticed he was a coach with the Keys sooner so I could have had an ATCRCS card ready. Instead, I found a few mainstream cards that I already had in my collection and had him sign those.
1995 & 1996 Donruss
1995 & 1996 Fleer
1999 Topps & Topps Stadium Club