Un-cited blurb on Sweezy's wikipedia page:

 

<p style="color:rgb(37,37,37);font-familyans-serif;">In 2015 weeks 1-5 Sweezy was ranked 36th RG in pass block, in weeks 5-10 was ranked 29th and amazingly in weeks 11-13 he was the 4th ranked RG for pass blocking.

 
 
I assume that's using PFF, but if you average that out it's likely in the high teens/low twenties for just right guards.

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