Ted Williams wore the number 9 for the Boston Red Sox.
Paul Konerko
Steve Rodriguez Rico wore no. 6. Steve Rodriguez is right. Here's a list of who wore every number: http://www.redsoxdiehard.com/players/unifnums.html
Tony Perez wore #5 for the Boston Red Sox.
Lefty Grove wore number 10 with the Sox in 1934.
Johnny Pesky wore number six. That number is now retired.
Ted Williams wore the number 9 for the Boston Red Sox.
Luis Aparicio wore #11 with the Boston Red Sox.
Crisp wore # 10 with the Red Sox.
Most recently, Marco Scutaro
Paul Konerko
Terry Forster
Click on the 'Red Sox Numbers' link on this page to see every player that wore every number in Red Sox history.
That was Johnny Damon who wore #18 for the Red Sox between 2002-2005.
Mike Ryba, a pitcher, wore #20 for the Red Sox between 1942-1946.
Johnny Damon
Pitcher Keith Foulke wore #29 for the Red Sox between 2004-2006.