Pass rushing once was a skill. In today’s NFL, it has become a position

Artifactual said
This is an interesting take. There probably are some veteran LTs that can't give you starter snaps all game but could come in on obvious passing downs and stop or slow down the pass rush specialist from the other team. This could start a trend and even extend the careers of veteran LTs who could still be a force to be reckoned with into their late 30s or early 40s, i.e. Jason Peters.
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The only counter to that is not all “pass rushers” play on the left side any more. Guys like the Bosa Bro’s play both ends, stand up, and move down to 3 tech. Guys like Parsons line up all over or where they think the weakness is. So having one OT change out really wouldn’t be that beneficial unless their only pass rusher was that DE.