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What's On Second Sports Cards in San Mateo, CA

4.8 ★★★★★ 80 Google reviews

PokémonSports cardsMagic: The Gathering

What's On Second Sports Cards sells trading cards at 221 2nd Ave, San Mateo, CA. It has a 4.8-star rating from 80 Google reviews. Customer reviews or the shop's own website show it carries Pokémon, sports cards and Magic: The Gathering.

Games carried

Each game is listed only when a customer review or the shop's own website mentions it.

  • “Other stores were sold out of Pokemon cards, but this store had them and of many different sets.” (Google review)

    Mentioned 8 times in reviews

  • “🔥🙏🙌 Always friendly and welcoming Everytime I walk in and willing to offer help and support within the sports card industry” (Google review)

    Mentioned 6 times in reviews

  • Magic: The Gathering

    More Magic shops →

    “As of recently, they now carry sealed Magic The Gathering product at very fair prices in addition to their usual selection.” (Google review)

    Mentioned once in reviews

What collectors say

  • Sealed product

    “It was worth it, I bought them a booster box and a trainer box, the owner was super nice and helpful, he let my kids choose their own box out of several.” (Google review)

    Mentioned 4 times in reviews

From Google reviews

I was recommended to What’s on Second via a mutual friend. I surprised my 7 year old Grandson with a visit right after school and Jordan helped us. Jordan is not only a nice guy but was sensitive to the needs of my Grandson guiding us through the whole buying experience. We bought both Pokémon and baseball cards.

★★★★★ Walter, Mar 2022

I recently got back into card collecting and What’s on Second happens to be the first shop that I visited . This shop has a charm if its own and is one of the last few stores that I have ever seen where you get real genuine personal service from the long time owner Jordan .

★★★★★ Mason, Dec 2024

Stopped by after listening to Tom Brady's Complex interview. Didn't buy anything, but the owner was super friendly nonetheless. They have Pokemon boxes in stock and reasonably priced. I'll stop by next time I'm itching to grab some sealed product.

★★★★★ Kevin, Jul 2025

Great little shop. Brought my 3 kids there the other day. They are die hard Star Wars and Warriors fans and Jordan has some Star War Cards lying around. He was on the phone and was kind enough to drop the call to show us around. They each got their first Steph Curry card.

★★★★★ Stephen, Aug 2021

Excerpts from public Google reviews. Read all 80 on Google →

Where to find What's On Second Sports Cards

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