He was playing because Ingram, Howard were hurt and Scruggs, Tomlinson suck worse than Sow. He wasn't that bad as a PS fill in. Notice how the run game looked better than it did the last time that the Texans played the Jags. The reason for this is that Brown, Sow, Patterson replaced Howard, Ingram and Scruggs, Tomlinson. Brown while not great in pass pro was a huge upgrade in the run game. Looks like Ingram is going to be out for awhile. When Howard gets back I hope they go with an ol that looks like this Ersery, Patterson, Andrews, Howard, Brown. Smart players that will eliminate a lot of the mental mistakes that were being made. You make these changes knowing that Brown is going to struggle some in pass pro, but this ol solves the 3rd and short, GL issues.
A decent PS, backup ol that won't kill your offense when he has to come in for injured players. Not every guy is an all pro level player, but some are decent fill ins. What do you expect from a PS level player?