In the past 75 years, the only pairs of teammates to get on base 300 times each were Derek Jeter and Bernie Williams on the '99 Yankees and Craig Biggio and Jeff Bagwell on the '97 Astros.
So, if Votto and Choo on the '2013 Reds achieve this feat, they will become the third pair in history.
Until today, Votto and Choo have reached base 122 times(72 hits, 47bb, 3hbp) and 116 times(58 hits, 41bb, 17hbp) respectively.
Votto's best record was 299 times(719 PA and .416 OBP) in 2011 and Choo's was 270 times(685PA and .394 OBP) in 2009.