ADAM Phillips saw red as Birmingham came from behind to win 2-1 against Barnsley at Oakwell on Saturday afternoon.
An own goal from Park Seung-Ho opened the scoring for Barnsley before a Jay Stansfield rocket and a header from the same £10m man put it beyond the reach of the Reds.
Phillips was also sent off at 1-1 for a second bookable offence after bringing down Ethan Laird on the halfway line.
Darrell Clarke made one change from his side's 1-0 defeat at Wrexham in midweek.
American centre-back Donovan Pines came in for Josh Earl, who did not make the match day squad.
Young forward Fabio Jalo was also not on the bench following his exciting display on Tuesday.
Sam Cosgrove, the former Birmingham City forward, was the only attacker on Barnsley's bench.
The Blues were forced into an early change after Adam Phillips' tackle on Alex Cochrane left the Birmingham player injured.
He was stretchered off following the innocuous tackle and replaced by Taylor Gardner-Hickman.
The first real chance of the match came from a Barnsley mistake.
Georgie Gent left the ball and Jay Stansfield capitalised to go through on goal.
He made amends just seconds later as he raced back for a superb last-ditch tackle.
On 17 minutes the Reds had their first chance of the game.
Gent did well to play through Humphrys who managed to cut inside in the box and lay it to Phillips on a plate.
But he slipped at the vital moment and his effort went well wide.
Barnsley should have had a penalty in the 36th minute after Humphrys was pulled to the ground but referee Thomas Parsons waved away the claims.
Clarke was booked for his reaction to the decision.
The Reds were by far the stronger team in the first half but went into the break all level.
And they started the second half the better of the two teams as well.
Keillor-Dunn almost made it 1-0 but saw his effort blocked and Russell was inches away from heading in from the resulting corner.
His header was headed off the line by a Birmingham defender.
The Reds continued to pile on the pressure and were unlucky to go ahead after O'Keeffe's effort almost caught out Allsop in the Birmingham goal.
He fumbled his attempt but did well to recover and stop it from rolling over the line.
The Reds got the opener they deserved on 58 minutes after Humphys' deflected shot was put into his own net by Birmingham defender Park Seung-Ho.
But the lead was short lived, as £10m pound striker Jay Stansfield fired it in from 35 yards against the run of play.
It was a fantastic goal, and there was nothing Killip could do about it.
Barnsley then did well to keep Birmingham out but Phillips was shown a second yellow card with 20 minutes to go.
Stansfield grabbed his second with ten minutes to go after heading in unmarked from a corner.
He almost made it a hat-trick int he 89th minute but Killip came out well to collect the ball.
The Reds pushed on in the eight minutes additional time but it wasn't enough and the game finished 2-1.