Beginning with the 2004 Topps and 2005 Topps releases, Topps included All-Star Game event-worn relic pieces from the previous year's All-Star Game.

Since the release of 2005 Topps Update and Highlights, Topps has included All-Star Game event-worn relic pieces from that year's All-Star Game.

This is a list of each Mariners player's All-Star relic card. 2005 Topps does not contain a relic piece from Ichiro, even though he was elected a starter.

While 2020 Topps Update does contain ASG relics, they are from previous years as there was no ASG played due to the COVID-19 pandemic. I consider them part of the list.

2021 Topps Update does not include a relic card of Yusei Kikuchi, the Mariners' lone representative. Kikuchi was injured and did not pitch.

2022 Topps Update does not contain a relic of Julio Rodriguez, despite his participation in the Home Run Derby and All-Star Game. Topps Now released HRD relics, which I will not include in this list. They were absurdly expensive then and are even more expensive now.

I plan to collect every base memorabilia card, excluding dual/triple cards. With the exception of Michael Pineda, who only appears on a dual relic card.

I recently discovered that 2004 Topps Clubhouse Collection contains ASG relics of balls, on-deck circle, and bases. I will likely consider these as part of my ASG set.

Topps Triple Threads also has ASG specific relic cards. However, I decline to include these as part of this list. For the years in which TTT has included ASG relics, Topps Update has already included base relic cards. The TTT versions amount to no more than prime patch cards, of which I've already excluded from the list. Moreover, the TTT relics are very limited so even if I wanted to include them on the list, I wouldn't because I could never find them.