I found it, thanks. As usual, detailed and informative.
If I read it right, Vollmer can make $1m more each year by playing in at least 90% of the offensive snaps. In my mind, that is not chump change. He probably gets a drive or two off each game anyway. If he tweaks a knee or ankle and misses one game, that is gonna cost him. If he drops below 80% the $ drops even more.