Grennan: The fact that it was close to home was important (he lives in Washington). Also, I knew about the defensive line coach, Wayne Nunnely, and knew he was a great coach. He has a reputation for developing young defensive linemen. This is only my second year playing on defense. Before that I was playing left tackle, and I was a tight end when I was at Central Washington.
Your defensive line coach, Wayne Nunnely, is the Chargers' longest tenured coach and a known advocate of including all of his players in the rotation. What has it been like working with Coach Nunnely, and what have you learned so far?
Grennan: Coach Nunnely has taught me a lot technique. That has been the main thing is getting my technique down. We are working on the little things like lining up on the inside shoulder of the tackle, getting off the ball and things like that.
Grennan: They both seem like great guys. There is really a great atmosphere with those two around. With Coach Cottrell, he runs a hardnosed defense. He has his guys ready to take it to 'em on every play.
Defensive tackle Ryon Bingham told SDBoltReport.com that you have been the most impressive of the undrafted rookie linemen. How flattering is this and what have you done to earn that distinction?
Grennan: It is an incredible honor for a veteran guy like Ryon to say something like that. I think the key for me has just been putting in the extra time. You have to be willing to put in the work on and off the field. Other than that, I've been working really hard to learn the playbook.
Scout.com subscribers can click here to read the rest of this interview, where Grennan talks about his first experience in a 3-4 defense, his goals for the season, and his quest to join the NFL's premier defensive line.