Julio Mateo
Baseball
Mateo went 4-2 with a 1.74 ERA in 15 games, including two starts, for Dominican Summer League Mariners in 1996. He tossed two complete games and earned one save.\n', '
In 1997 Mateo went 3-1 with a 3.30 ERA in 13 outings, including six starts, for Arizona League Mariners.\n', '
With the Short-Season Everett AquaSox in 1998, Mateo went 3-3 with a 4.70 ERA and four saves in 28 relief appearances. He also allowed one run over 11⁄3 innings in his lone outing for the Class-A Advanced Lancaster JetHawks.\n', '
They come and go. We’ll email you the moment one lists.
🔔 Sign in to get an alert
ISO
Nobody has an ISO for Julio Mateo yet. Be the first.
What’s an ISO?
ISO means in search of. You post the autograph you want (who, what item, your budget), and sellers who can get it, or already have it, reach out to you. It’s free, and it’s how many collectors find pieces that never hit eBay.
In RACC collections
Pieces RACC members have put on show
No Julio Mateo drops yet. Be first to know when there is one. Drops are official signed merchandise that artists, record labels and official distributors release regularly, and they sell out fast.
Alerts come as one daily summary email, most popular first.
TTM
Nobody has logged a through-the-mail request to Julio Mateo yet. Be the first to log a TTM.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Terms of Service · Privacy Policy · Community Rules
© 2026 Real Autograph Collectors Club
