si.com

Readiness by lane

Green: si.com. Thin bar: Sports Broadcast & Fantasy Games peer median.

Priority fixes for si.com

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Harden

   HSTS kept for at least a year

   Observed: The homepage response did not include a Strict-Transport-Security header.

   Why it matters: HSTS tells browsers to use HTTPS for your host on every later visit, which removes the window where a first HTTP request can be intercepted.

   What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.

   On Amazon CloudFront: Attach a response headers policy with Strict-Transport-Security to each distribution.

   27% of Sports Broadcast & Fantasy Games peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.

   Guide: HTTPS and TLS Guide for Website Owners

2. Priority 2 · Accelerate

   No render-blocking scripts in <head>

   Observed: The homepage <head> loaded 2 external scripts without async or defer.

   What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.

   43% of Sports Broadcast & Fantasy Games peers do this.

   Guide: Control Third-Party Scripts Before They Control Your Page

3. Priority 3 · Accelerate

   Offscreen images lazy-loaded

   Observed: The homepage had 107 images and none used loading="lazy".

   What to do: Add loading="lazy" to images below the fold. Do not lazy-load the main hero image, because that delays the largest visible element.

   56% of Sports Broadcast & Fantasy Games peers do this.

   Guide: Lazy Loading Without Broken Pages

4. Priority 4 · Harden

   Certificate lifetime of 100 days or less

   Observed: The certificate from Amazon had a 197-day validity period, longer than the 100-day maximum that applies from March 2027.

   What to do: Move to automated issuance and renewal now, while you still have time to test it.

   70% of Sports Broadcast & Fantasy Games peers do this.

   Guide: HTTPS and TLS Guide for Website Owners

What si.com already does well

Practices fewer than half of Sports Broadcast & Fantasy Games peers use.

• Referrer-Policy setReferrer-Policy present.16% of peers
• DMARC policy enforces quarantine or rejectDMARC policy p=quarantine.32% of peers
• Modern image formats in useWebP or AVIF images detected.35% of peers

What we saw

Homepage checked

https://www.si.com/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Amazon, 197-day validity, expiring 2027-01-20

CDN or edge

Amazon CloudFront

DNS operators

Amazon Route 53

DMARC policy

p=quarantine

Homepage HTML

2,139 KB, gzip

Images on homepage

107 (jpg 874, png 50)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

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Sports Broadcast & Fantasy Games readiness benchmark