The left-hander had never pitched higher than Double-A before this season but he's made quite an impression. The rookie left-hander, whom Cubs manager Dusty Baker calls the "surprise" of Spring Training, talks about his impressions of the Major Leagues, how tough it is to find clothes that fit, his lucky meal, and his twin brother, Brian.

MLB.com: Do you remember when you got your first glove?

Marshall: I remember Dad came home with a couple for my brother and I. We played all the time. The youngest memory I can think of is we used to play catch in the cul de sac, my brother and my dad and I. That was a long time ago. T-ball years. I was probably 5 or 6.

MLB.com: If you weren't playing baseball, what do you think you'd be doing?

Marshall: I don't know -- I'd have to do something baseball related. I have a lot of knowledge in baseball and I'd probably want to spread it, maybe start a baseball school. Away from baseball, I'd open my own business. I don't know exactly what I'd be doing.

MLB.com: Because of your height, did you play much basketball?

Marshall: I never really played too much basketball.

MLB.com: What's been the biggest surprise about being in the big leagues?

Marshall: The biggest surprise is the treatment -- they really treat us well here and the fans especially. It's unbelievable. Every day I go out there and listen to the fans, it's unbelievable. The game we won in the eighth inning [on Monday against the Marlins] the other day, I thought it was the most unbelievable place in the world. Just the support here is really cool.

MLB.com: When you're on the plane, do you listen to an iPod or read a book?

Marshall: The iPod or the PSP [Play Station Portable]. I play games against Matt Murton -- usually baseball. We're in a seven-game series and it's even right now.

MLB.com: What's your favorite pregame food?

Marshall: I had a good meal [Tuesday]. I had steak for lunch and a bratwurst before the game. I might do that again.

MLB.com: Because of your height, is it tough to shop?

Marshall: It's very hard to shop for clothes. It's hard to get stuff long enough to fit my long arms. And the legs, too. Finding something to handle my arms and 36-inch pants is hard.

MLB.com: I'm sure you've heard every tall joke.

Marshall: I didn't really get really tall until my last year of high school and then college. I've had my fair share. "Watch your head" -- definitely.

MLB.com: What's the toughest part about having a twin brother?

Marshall: It's great. We used to get confused a lot. Kids at school would call me "Brian" and call him "Sean." That doesn't happen too much any more because he's in one place and I'm in another. Plus, he's got the long hair going on.

MLB.com: Is there some special connection that twins have?

Marshall: We have a little bit of a connection, I guess. It's been good to have somebody always there who I can give a phone call to -- he's like my best friend. I can talk about anything with him. It's been good.

MLB.com: What were you studying at Virginia Commonwealth University?

Marshall: I was a business major. I've got one semester to go. Hopefully, I can knock it out over the years.

MLB.com: What do you think when you hear that a pitcher like Greg Maddux says he's impressed by how you've pitched?

Marshall: Special. It makes me feel good. It's a pretty good feeling to know guys like that who have respect for the game tell me I'm doing a great job. It's pretty cool.

This story was not subject to the approval of Major League Baseball or its clubs.