I think in most cases it will be due to a significant upgrade.  Several of last year's opening day starters are no longer with the team, so those positions will have new starters by definition.  Other positions were upgraded in FA - you certainly hope most of the new UFA signings will earn starting jobs in training camp.  That's also a good thing, if we can upgrade a weak position like FS or RT, or fill the OTTO position with a solid starter in Skuta.  Then there are draft choices who may be ready to contribute right away - slot WR, RB, LEO, PR, KR?

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