So all I've been able to think about over the past two days is: 1. Who goes if the Cubs make a deal for Stanton 2. If they all stay, where do they play? If they all stay, the biggest question is who plays short. I'm not great with advanced defensive metrics, so I stuck with fielding percentage and range factor: Baez Fielding% RF 2012 .950 4.31 2013 .932 4.88 2014 .965 4.05 Total .941 4.46 Russell 2012 .951 4.06 2013 .966 3.97 2014 .968 4.07 Total .962 3.94 Castro - Minors 2007 .943 4.71 2008 .955 5.10 2009 .937 4.86 2010 .953 3.92 Total .944 4.73 Castro - Majors 2010 .950 4.20 2011 .961 4.51 2012 .964 4.51 2013 .967 4.11 2014 .970 4.19 Total .962 4.33 ...or if you'd prefer a simpler table, here are the careers: Player Fielding RF Baez .941 4.46 Russell .962 3.94 Castro Minors .944 4.73 Castro Majors .962 4.33 Some things I see: Castro had the highest minor league RF by a wide margin (4.73) but it dropped to around 4.20 his rookie year. It bumped up to 4.51 for two years, but has settled in at 4.20. His fielding percentage has been on a steady upward march from .950 to .970. Russell overall the steadiest fielder of the three, but has consistently been around 4.00 range. For reference, since they've been compared a lot, Barry Larkin had a career .955 fielding% and 4.45 RF in the minors, and didn't have a range factor under 4.40 until he was 31. Baez had huge range (4.88) last year, but that was coupled with a .932 fielding percentage. This year, he's pretty much matched Russell's career totals at .965 / 4.06. All three guys are 6'0" 190-195. All three could probably pack on more weight if you put them at third. Castro had to get bigger over the offseason just to get to his current size, while you're uncertain how big Russell and Baez will get. (Speculation time) Castro still has 4.20 range at 24 at his current size, and has steadily improved his fielding percentage. If I had to guess I'd guess he stays at short. If Russell continues his current career arc, with the steady fielding percentage and moderate range, I'd guess he's at third. Baez showed the 4.88 range last year, and hasn't gotten quite the scouting marks for level-headedness and consistency that Russell has gotten, so I'd probably have him at second using the range and making the shorter throw. I think you could benefit from the increased power of either Russell or Baez bulking up for third. You might get the most bang for your buck out of Javy, though. I also think that, just based on those numbers, you could sell Baez as a short stop to the Marlins. Any way you cut it though, if you start all three of these guys along with Rizzo, Bosio is going to be a happy man.