Notts County manager Neal Ardley named a surprise team to face Barnet this afternoon in the National League play-off semi-final at Meadow Lane.
The Magpies boss left out winger Enzio Boldewijn and defender Connell Rawlinson who were both on the substitutes' bench for the clash against the Bees.
Defender Ben Turner came in to replace Rawlinson and he will play alongside the impressive Alex Lacey.
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In midfield, O'Brien has come in for Boldewijn and is likely to play on the left-hand side, but in a much more narrow position rather than an out and out winger.
Apart from those two selection surprises, given both players have had fine individual seasons, the team had a familiar look.
Sam Slocombe was back in goal after a lengthy spell on the sidelines through a groin injury and he was part of a back five consisting of Richard Brindley, Lacey, Turner and on-loan Cardiff defender Joel Bagan.
In midfield Callum Roberts occupied the right-hand side with captain Michael Doyle partnering Mitch Rose in midfield.
O'Brien is on the left. Up front, Kristian Dennis got the nod to partner Kyle Wootton with Wes Thomas starting the game on the bench.
Scott Wilson, Zoumana Bakayogo and Sam Osborne did not make the squad.
