1. 2018 Topps UFC Chrome #FA-SOM on eBay
Topps, autograph rookie card, Checklist Center lists FA-SOM in the Fighter Autographs set; the Rookie Auto wording is from Topps' Ripped guide, which shows the Octofractor version.
Sean O'Malley's key rookie card is the 2018 Topps UFC Chrome #FA-SOM. Sean O'Malley's rookie season was 2017. Won his way into the UFC on Dana White's Contender Series and debuted in December 2017 with a decision over Terrion Ware. The checklist below lists one rookie card by card number, one of them autographed, each row from a cited source.

Rookie year 2017
Photo: U.S. Department of the Interior, Public domainKey rookie card
2018 Topps UFC Chrome #FA-SOM
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Topps, autograph rookie card, Checklist Center lists FA-SOM in the Fighter Autographs set; the Rookie Auto wording is from Topps' Ripped guide, which shows the Octofractor version.
Topps, chromium, First-year Topps Chrome base; Beckett says the set marks rookies with an RC logo but no fetched checklist line marks this card.
Sources [1]
Panini, chromium.
Sources [1]
Panini, autograph.
Sources [1]
Topps, chromium, Current Topps Chrome UFC base card; the checklist line carries no RC marker.
O'Malley debuted in the UFC in December 2017, during Topps' first run as UFC licensee (2009-2020). Topps' own Ripped guide calls his 2018 Topps Chrome UFC Fighter Autograph his rookie autograph. Topps took the UFC license back in 2024 and is the exclusive UFC card maker again; its current release is 2026 Topps Chrome UFC.
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Career facts: [1]
1 rookie card and 4 other cards with card numbers, each from the checklist linked on its row. A row marked "one source" is printed by one checklist site only. Parallels are counted, not listed.
A PSA 10 (Gem Mint) or BGS 9.5 is the top grade most collectors look for: sharp corners, clean edges, centered printing and an unmarked surface. A graded card and a raw one are different cards to look up. How the four graders compare and what grading costs.
PSA
One overall grade on the label. Centering weighs heavily in it.
CGC
Authentic (AU) for a genuine card that cannot take a number; Authentic Altered (AA) for one that was altered.
Source: CGC grading scale
Beckett (BGS)
Four subgrades on the label: centering, corners, edges and surface.
Source: Beckett grading
Grading scales as each grader describes them, checked Oct 16, 2026.
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Not enough lookups to measure this week.
Card facts checked 2026-10-19. Parlae prints no card values. Set and brand names belong to their makers; Parlae is not affiliated with them.
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By the Parlae deskCard data updated Oct 19, 2026 at 10:22 AM ETHow this is builtReport a wrong number