Defender Webb conceded three goals in his 20 minutes between the sticks
Luke Moore and Danny Kedwell bagged two goals each as AFC Wimbledon thrashed 10-man Salisbury, who ended up with defender Danny Webb in goal.
Moore scored his first Dons goal to open their account, finding the top corner with a 35-yard stunner.
Keeper James Bittner was sent off for fouling Moore and Webb took his place.
Kedwell stepped up to convert the resulting spot-kick and netted again from close range before Moore made it four from 12 yards out.
Salisbury manager Tommy Widdrington told BBC Wiltshire:
"I thought Wimbledon started the game better than us and came at us all guns blazing, but to be fair to the lads they weathered the storm.
"For 25 minutes of the second half we were absolutely bossing the game. James [Bittner] contests that he didn't touch him [Luke Moore] but I haven't seen the video yet.
"We've lost our goalkeeper and we're 2-0 down from completely out of the blue."
AFC Wimbledon: Pullen, Garrard, Lorraine (Judge 86), Johnson, Hussey, Hatton, Wellard (Taylor 63), Gregory, Kedwell, Main (Duncan 62), Moore. Subs Not Used: Brown, Godfrey.
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