On April 4, 2005 — Opening Day highlights include the Baltimore Orioles’ Sammy Sosa and Rafael Palmeiro who become the first pair of teammates to have at least 500 career home runs apiece. Sosa opens the season with 574 career HR and Palmeiro 551.

 


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Sources:
Baseball Reference April 4
National Pastime April 4
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game