Two Big Cats!-related blog posts in one day. What can we say? He's a busy guy. This time, the producer has teamed up with hip-hop duo Tribe and a slew of local guests (including the afore-blogged Guante, Big Zach, Baby Gracious, Franz Diego, Chantz, and Claire Taubenhaus) to put together a free mixtape, which they released today. Grab Let's Be Professional below, and keep up with all of Big Cats! projects on his website.