When does two equal one? As a mathematical question you can contemplate, but as a baseball question, this revolves around one particular position – catcher. For the Boston Red Sox, it is the duo of Christian Vazquez and Sandy Leon being compared to Tony Pena.
The Red Sox catching duo had a rather dismal -2.1 fWAR for 2018 and that aligns rather well with Pena’s -2.0 fWAR in 1993 – his last Boston season. In 1993, the Red Sox catchers – primarily Pena – were last in the American League catcher rankings, but a catcher does not live by bat alone.