Wilmington Blue Rocks help

[cudabuda69]

Need some help identifying these jerseys. I mainly collect hockey but have recently come across these. Both have GMAC sponsorship embroidered on left sleeve with a D under it. Both have the blue rock mascot with pick axe and baseball on right sleeve. Neither have nameplates or any evidence of ever having one. No neck tags. Tag on front is DeLong size 44 on both. Any info on year or player would be great. They look like specialty jerseys. Can't find any photos of this style. Both show decent wear. Post here or email me @ cudabuda69@comcast.net.
Thanks, Jes

[JD&TANMAN]

Jes, I have a lot of Blue Rocks Jerseys, most from the when the Royals were using Wilmington as their high level A team. This jersey looks like it is from the Boston era, maybe 2004, but I have never seen a DeLong Blue Rocks. So that could mean you are correct in your belief of specialty worn jersey. Somewhere I have all the rosters from those years. I will try to find them and get back to you. Good luck, MD