Welcome to SportsNation! On Friday, ESPN.com senior MLB writer Jayson Stark will drop in to chat some baseball.

Jayson Stark has been a senior baseball writer for ESPN.com since 2000. His regular contributions include the newsy Rumblings and Grumblings column and his tilted look inside baseball's numbers and quirks, the Useless Information Department.

Click here for information on Stark's newest book "Worth The Wait" - which tells the story of the Philles' 2008 World Series championship. Read an excerpt of the book here.

Send your questions now and join Stark Friday at 1 p.m. ET!

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