Bill and Yahoo's Nate Tice discuss the ways in which the NFL has evolved over the past 30 years.

0:00 Welcome

3:44 How much has QB play changed pre-snap?

18:55 Has QB play changed much post-snap?

25:51 Why are QBs scrambling more?

32:46 Are schemes better? More prevalent?

41:11 How has offensive line play changed?

49:40 Has tackling improved?

52:52 Is refereeing better or worse?

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