There had been incessant rain throughout the game and the referee talked to both managers at the break.
However, he did re-start the match but then abandoned it after 56 minutes as the deluge continued.
Bentley said: "Some refs would stop it, some wouldn't and you just have to get one with it. It's one of those things.
"You turn up and you want a game of football and both sets of fans will be disappointed but the pitch was getting worse and you could see puddles and it was hard to get the ball down to pass.
"It was becoming silly and obviously we weren't pushing to stay on being down to 10 men."
"It has been good, we have been after a right-back for a while - it's a specialist position - so we are pleased to have Sean with us," said Bentley.
"Jamie did well for the 56 minutes against Accrington and obviously to have Jack Redshaw on a two-year deal is good news for us. We have had to wheel and deal but we are happy."
Bentley said he would look at the red card incident, adding: "We will watch the DVD and if we can appeal, we will. Alex is a good honest player and I would back him."
The rain made for a scrappy derby clash. In the first half Morecambe forward Kevin Ellison hit the crossbar with a header while Accrington's best chance to fell to George Bowerman who scuffed an effort in front of goal.
There was little to choose between the sides but then, on the stroke of half time, midfielder Kenyon made a late challenge on Murphy and referee Adcock had no hesitation to show him a straight red card.
- Sports & Recreation
- James Beattie
- Peter Murphy