Bournemouth boss Eddie Howe conceded that Grimsby deserved to win at Blundell Park and described the 3-2 defeat as "a blip".
Substitute Ashley Chambers grabbed the winner in the last minute after Grimsby twice led through Jamie Devitt and Michael Coulson only to be pegged back by goals from Lee Bradbury and Liam Feeney. Cherries' substitute Jeff Goulding entered and left the field of play in the same minute, the 70th, receiving a straight red cad for an elbow on Jude Stirling.
Howe said: "I don't think we played well at all the whole game. We got what we deserved. Grimsby were the better team, credit to them. Apart from our goalkeeper and two centre-halves we were poor."
He added: "It was a sending off, it's a strange one because it's not like Jeff. I don't know what goes through players' minds. But it happened and we have to deal with it.
"We have performed well for the majority of the season but this was a blip."
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