Lou seems convinced that it's always better to use a LHP against LHB and a RHP ve RHB. The truth is that many  Cubs players do not perform according to the book. Let's take a look at some of those guys and see what their numbers are.

Gregg vs RHB .858 OPS in 127 PA    sOPS+ 133      vs LHB .578 OPS in 107 PA  sOPS+ 48

Marmol vs RHB  .701 OPS in 133 PA  sOPS+ 100     vs LHB .545 OPS in 116 PA  sOPS+ 46

Heilman vs RHB  .817 OPS in 140 PA sOPS+ 125    vs LHB .760 OPS in 102 PA  sOPS+ 98

Guzman vs RHB  .565 OPS in 115 PA  sOPS+ 56      vs LHB .676 OPS in 77 PA    sOPS+ 73

We can all see that only Guzman fits the mold of using a righty-righty matchup. Clearly the other 3 are considerably better against LHB. When we dig down to the rest of the bullpen we also have some striking numbers.

Samardzija vs RHB .936 OPS sOPS+ 156      vs LHB  .896 OPS   sOPS+ 133

Marshall  vs RHB .808 OPS  sOPS+ 107         vs LHB  .620 OPS   sOPS+ 76

Grabow  vs RHB  .689 OPS  sOPS+ 80            vs LHB  .712 OPS  sOPS+ 104

Of the remaining bullpen only Marshall follows the script. Samardzjia shows no evidence that he can get either RH or LH out. It begs the question to ask why he isn't at AA learning how to pitch. As for the disparity between perception versus reality in our pen, I would hope that Lou one day takes into accout what our guys are doing rather than what he wants them to do.