Looking on the internet deeply has found these results:

one of the best team is the most popular phrase on the web.

one of the best teams 1915,000 results on the web	one of the best team 1972,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
One of the best Asian teams but we aren't afraid of them. Agent Keen, the neurology team at Bethesda's one of the best. Only one of these amazing teams can claim the title of the best high school show choir in America. Bones, you're looking at the star point guard from one of the best college basketball teams ever! But Burnley back then were one of the biggest and best teams in the country and they were 20 miles away from where I lived. He's one of the best players on the team, so... Even the best teams only need one quarterback. They're one of the best teams out there	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

one of the best teams

1915,000 results on the web

one of the best team

1972,000 results on the web

More popular!

One of the best Asian teams but we aren't afraid of them.
Agent Keen, the neurology team at Bethesda's one of the best.
Only one of these amazing teams can claim the title of the best high school show choir in America.
Bones, you're looking at the star point guard from one of the best college basketball teams ever!
But Burnley back then were one of the biggest and best teams in the country and they were 20 miles away from where I lived.
He's one of the best players on the team, so...
Even the best teams only need one quarterback.
They're one of the best teams out there

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.