Chicago Cubs: #4: Sammy Sosa and Moises Alou
They were together for only three seasons, but there was a lot of thump in the middle of the order when these two were on the Cubs. Sammy Sosa was a Cub for 13 seasons, and his best years were from 1998-2001, but he still was blasting plenty of homers in 2002-2004 when he had Moises Alou on the other corner of the outfield.
In those three years, the two slugged a combined 200 home runs, drove in 549 tallies and collectively batted .278. Alou averaged a 4.2 fWAR as a Cub and Sosa averaged a 3.2 fWAR in the three years he played with him.
In the 2003 NLCS, they combined for four home runs, 11 RBI and a .406 OBP which was, as we all know, unfortunately not enough to win the series. Both guys left the Cubs after 2004 on very different terms.