Duane Brown was not present for the Texans’ voluntary organized team activities today because he is pushing for a reworked contract, sources tell Aaron Wilson of The Houston Chronicle. 
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Brown has two years to go on the six-year, $53.4MM contract extension that began with the 2013 season. Right now, he’s due non-guaranteed base salaries of $9.65MM and $9.75MM in each of the next two seasons. After four consecutive quality seasons, a case can be made that Brown deserves to have some of his future money guaranteed as a part of a contract extension.
Still, teams typically are reluctant to rework contracts when there are two years to go for fear of setting a precedent with other players. Unless Brown is willing to stay away from the Texans during mandatory camp, he probably won’t get far with his demands.
Brown missed four games last season thanks to a torn quadriceps muscle. In the five years prior to that, however, he missed only four regular season games in total.