Jonjo Shelvey and Stewart Downing scored their first goals for the club, captain Steven Gerrard was on target on his first start for two months and there was also a goal for £35million record signing Andy Carroll. There was even the sight of defender Fabio Aurelio, who has not played since the final game of last season, featuring for an hour.
Dalglish said: "Stewart Downing scored, big Andy got a goal, Jonjo scored and Steven scored with a penalty, so we've had a few positives. Fabio got his first 60 minutes of the season, so for us there were a lot of positives to come out of it. They just need games. Every single one of them will be better for it."
He added: "There was nothing wrong with their application but you can train as much as you want but you can't replicate what happens on a pitch."
Gerrard marked his first start after two months out with an ankle infection with a goal and was praised by his manager.
"It is fabulous what he has done and how hard he has worked to come back - playing a full game is fantastic is for him," Dalglish added.
Oldham manager Paul Dickov felt his side could have made more of their early chances but labelled the late first-half penalty - when Tom Adeyemi was adjudged to have fouled Maxi Rodriguez - as a "joke".
"The first 20 to 25 minutes we played some decent football and we had three or four really good chances before we scored," he said.
"If you concede straight after scoring it puts you on the back foot and to concede from a deflection was a bit of sickener. The penalty is a joke. I thought he fell over. Tom was looking at the ball and there was no way he can see him (Rodriguez).
"They (the players) are an honest bunch and they were livid it was given just before half-time. I believe we could have come here and won but to lose 5-1 I am gutted for the fans and players. It is a little bit deflating."