Jermichael Finley -- I'm STOKED My Teammates Moving to Justin Bieber's Hood

Packers superstar Clay Matthews just got the Jermichael Finley stamp of approval ... 'cause the tight end tells us Clay's decision to buy real estate in Bieber's neighborhood is a "GREAT MOVE."

We broke the story ... Clay recently purchased a plot of land in The Oaks in Calabasas -- a private community where Justin Bieber has been raising hell for the past few years.

But Clay's Green Bay teammate tells TMZ Sports he's PUMPED for Matthews -- "If he's trying to party, it's a great move!"