From the Twitter account of Tim Dobbins' agent:
Client Tim Dobbins was released from the Texans. We appreciate our time and everyone at the Texans organization. Tim is 100% healthy— David Canter (@davidcanter) October 22, 2013
After signing a one-year deal to remain with the Texans in April, Dobbins made headlines when he skipped OTAs to work on his house. Canter, the aforementioned agent, assured everyone that Dobbins' absence was a non-story, as OTAs are "[an] owner/ coach conspiracy" and "completely useless" to most veterans. For his part, Dobbins said he'd "do it all the same way" when he reported to mini-camp in June.
Dobbins was inactive for three (3) of the Texans' first seven games this season. Given the team's alarming lack of depth at inside linebacker, especially in the wake of Brian Cushing's season-ending injury, the timing of Dobbins' release is surprising. Time will tell if the Texans' rationale for jettisoning Dobbins manages to make its way to the public.
Best of luck to Dobbins as he looks to continue his career elsewhere.