The Mets use a stat called bases per out internally to help evaluate offensive performance and as a benchmark to measure how well players fit into their overall organizational philosophy. The Mets haven't spelled it out exactly, but it's pretty easy to figure out what it means.
Bases infers total bases with walks mixed in. Outs infers at bats where the batter makes an out. Per means it's a rate stat and you should divide. I added hit-by-pitches to bases and assumed that errors and fielders' choices counted as outs. I multiplied the bases by two because the original article suggest Mets players would get $200 for a base but lose $100 for an out. So here are the Mets' leaders from last season.
|Matt den Dekker||21||46||0.9130|
That seems roughly like a ranking of the Mets' best hitters last year. Andrew Brown, Josh Satin, and Anthony Recker's standing on this list probably has a fair amount to do with why they made the 2014 roster. The league-average BPO last season was 1.2959, which means that most of the Mets were actually below that, and that correlates with the Mets' below-average offense.
How did the Mets' offseason acquisitions fit with their stat? The two main hitters the Mets acquired, Chris Young and Curtis Granderson, did okay from 2011 through 2013. Here they are, along with some other prominent names that were linked to the Mets.
Michael Bourn was from last offseason, and he didn't do very well in 2013, dragging his BPO down to league average. All the other guys are above average. Granderson is clearly a good signing according to this stat, but it's interesting that Nelson Cruz did better than Chris Young. The Mets probably factored defense and position into that equation, knowing that they might need someone to play center field if Juan Lagares got hurt or didn't perform.
The BPO stat is hardly groundbreaking, but it does seem to rank players pretty well with their actual ability. The best players are at the top of the list, and the bottom of the list features pitchers and guys like Jeff Francoeur. I'll leave you with a list of the seven best players by bases per out in 2013.