Hall of Famer Johnny Bench joined the line-up of celebrities taking part in the "Trading With the Stars" portion of the CNBC Million Dollar Portfolio Challenge. Bench appeared today on "Squawk Box"--the show he's trading for.

Remember--each show will have a celeb ("Morning Call" and "Closing Bell" have two each) trading for bragging rights and a good cause. The best performing portfolio using CNBC "bucks" at the end of nine weeks wins a very real $50,000 for his or her favorite charity. Each of our participating celebrities will receive $5,000 towards their favorite charity --just for playing.