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Utah Mammoth rookie cards: the key rookie card of every player we cover

The Utah Mammoth player collectors look up most is Clayton Keller, whose key rookie card is the 2017-18 Upper Deck Series 2 #477. Below, the key rookie card of each of the 4 Utah Mammoth players with a sourced card page, then the club's rookies and second-year players, all by collector interest.

Attention measures how much people are looking up this player, a leading indicator collectors watch. It is not a price. Source: Wikipedia pageviews through 2026-10-15.

Utah Mammoth key rookie cards

By our printed criteria, from each player's cited checklist.

  1. 1

    Clayton KellerUTA RW

    Key RC: 2017-18 Upper Deck Series 2 #477

    5,353 lookups in 30 daysdown 13% this weekFlat

  2. 2

    Logan CooleyUTA C

    Key RC: 2023-24 Upper Deck Extended Series #701

    5,107 lookups in 30 daysdown 21% this weekCooling

  3. 3

    Nick SchmaltzUTA C

    Key RC: 2016-17 Upper Deck Series 1 #229

    4,290 lookups in 30 daysdown 48% this weekCooling

  4. 4

    Dylan GuentherUTA RW

    Key RC: 2022-23 Upper Deck Series 2 #497

    4,042 lookups in 30 daysdown 35% this weekCooling

How this list is ranked

Collector interest is how many people looked each player up on Wikipedia: the last 30 days for the ranking, the last 7 against the 7 before for the weekly change. It measures attention, not what any card sells for, and Parlae prints no card values. A key rookie card is picked by the criteria printed on each player's card page, from his sourced checklist.

By the Parlae deskCard lists updated Oct 16, 2026 at 12:22 PM ETHow this is builtReport a wrong number