Jose and Javier Valentin were both Major Leaguers. Jose played from 1992 to 2007 and amassed 249 home runs and 816 RBI. Javier was a catcher from 1997 to 2008 with a .258 batting average.
Their father, Jose Valentin Sr., was involved in their baseball development growing up in Puerto Rico as an official and manager with the Junior League World Series in 1983 and 1989. Now in 2013, Jose Sr. is back with his grandson in the World Series event.
See attached link about the Valentin family in The News-Herald: