Fairbairn (right quadriceps) was listed as full on Monday's practice estimate.
Fairbairn didn't practice at all before missing the Texans' last two contests, so his listed activity level Monday is a step in the right direction. Matthew Wright has filled in for Fairbairn the past two contests, connecting on all four of his field-goal attempts and both point-after tries. Fairbairn's full walkthrough implies he's set to return Thursday versus the Bills, but as of Monday both he and Wright remain on Houston's active roster.