In case you've never caught it before, CSN Bay Area runs a daily show called The Lunch Box. The show includes interviews and other segments, and is a bit of a lighter approach to sports. They cover all the Bay Area teams, and this week they have an interview with Tramaine Brock. He discussed everything from what makes Coach Harbaugh different to what it's been liking meeting 49ers fans to his celebrity crush.
Brock has worked his way up from undrafted free agent to practice squad to 53-man roster to active contributor over the last few years. He is primarily a special teams guy right now, and has been a key contributor in that role. For now it is going to take some time for him to crack the cornerback rotation, but considering he is fifth on the 49ers cornerback depth chart at this point, I'd say that's some deep depth.