Carroll has not featured regularly for the Hammers this season, with Slaven Bilic generally utilising him as an impact substitute.
And although Cottee admits that it is hard to judge Carroll’s quality, due to his struggles with injury, the former Hammers striker believes that the England international can be brilliant on his day.
“It’s so hard to judge Andy because of his injuries but, at times, he is unplayable,” Cottee said.
Carroll has made just seven Premier League starts this season, with 13 of his appearances coming off the bench.
The 27-year-old has scored just four times, and his future at West Ham is still up in the air.
There have been suggestions that Carroll could leave the London club in the summer, with Bilic’s side seemingly on the look out for another striker.
If West Ham do sign a new front man in the summer it will increase competition for places at West Ham significantly, meaning Carroll could find it even harder to start matches.
If Carroll does leave West Ham, he will end a three year stay with the club, after joining permanently from Liverpool back in 2013.