2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) Cards
The complete 2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) checklist: 1 card — cards spanning 2022, 1 rookie card.
Data updated July 1, 2026.
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baseball
2022
Topps Heritage 20221 card
Frequently Asked Questions about 2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) Cards
Does 2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) have a rookie card?
Yes. The AgentGrail catalog includes 1 2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) rookie card across this set. Rookie cards are among the most sought-after Baseball cards for collectors and investors.
What years were 2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) cards made?
The AgentGrail catalog includes 2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) cards from 2022, totaling 1 cards across all sets and brands. The earliest cards date from 2022 and the most recent are from 2022.
Where can I buy 2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) cards?
eBay is the largest marketplace for 2021 Rookie Pitchers (Austin Warren / Conner Greene / Glenn Otto) baseball cards, offering both raw and graded (PSA, BGS, SGC) copies. Use the "Find on eBay" buttons on this page to search current listings. For investment-grade copies, look for PSA 10 certified cards.
Answers are grounded in AgentGrail catalog data and recent eBay market comps.
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Compiled by the AgentGrail team · Data refreshed July 1, 2026