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The owners also banned roll-up blocks to the side of a player. In the past, the rule only barred such blocks from behind.

“We saw some plays on tape that we just felt like we needed to expand that protection,” McKay said.

Commissioner Roger Goodell believes small changes like that one, along with other recent rule changes, have made the game safer.

“We went through that (data) in greater detail with the outside firm that’s been tracking that for us and it’s very clear that the rule changes we have made had the positive impact that we intended,” Goodell said Monday. “While there are some that say it has had a negative (impact) — as an example, ACL injuries being up — that’s not the case. What we’ve seen is that players have adjusted to the rules and they are finding that target zone and it is a safer, better game because of it.”

A dozen other proposals for rules or bylaw changes were being considered by the owners, with votes on them expected Wednesday.