Oxford United have completed the signing of former Bradford City and Exeter City full-back Luke O'Brien on a free transfer.
O'Brien had been looking for a new club since being released by Exeter in the summer, having only moved to St James Park from Bradford in January.
The 24-year-old has now agreed a deal with Oxford and could be involved on Saturday when Chris Wilder's side face Burton Albion in League Two.
"He is a player we have seen a number of times over the years and he has always impressed," Wilder told the club's official website.
"He has a lot of games under his belt considering his age and is keen to do well here.
"He has a chance to come in, show us what he can do, and be part of what we are trying to build."