If anything, he should be extended, with extra Game Day bonuses for games in which he plays LT.
$11M is fine for an OK Left Tackle, which he is.
$11M is fine for a much better than average RT. Running behind Onwenu and Brown would be awesome.
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We need to focus our efforts at acquiring LT's, starter, backup, and future backup (Practice Squad player).
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If Brown needs to play a bit of LT while a rookie gets started, so be it. However, I actually like Brown and McDermott at RT, with competition for McDermott.
I have wanted a swing veteran OT for years, Those are hard to get.
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ALL THIS DISCUSSION DOESN"T MEAN MUCH
if we don't have an OL coach, and OL assistant coach. We will Brown, who occasionally needs coaching. And then, we have all the rest who would absolutely need coaching to develop.