If we're talking about expanding any deal with the Reds, I'd love to try and get both Leake and Latos from them. One has to think they're going to be looking to either extend Cueto, or would want a LOT more for him - as they should. However 4/5 of their rotation will be free agents at the end of next season (Leake, Latos, Cueto and Simon), and again, I'm assuming they try to extend Cueto.
Latos has been discussed a lot in this thread (clearly) and I like him too. On Mike Leake, he has made 30, 31 and 33 starts the past three years and is 26. In his career he has a 3.92ERA; 1.294whip; and 2.70 k/bb ratio. Small sample size applies, but in his career for inter-league starts (17 - a little more than half a season) he has a 3.56ERA; 1.086whip and 3.08 k/bb ratio.
At the major league level, they are pretty well set at most of their positions, with the exception of left-field. Winker is likely their LF of the future, but at this point he has less than 100 plate appearances at the AA level - he's at least a year, and more likely two years away from taking over a job in the majors.
However,their rotation has only one pitcher under their control for more than next year (Homer Bailey). If one assumes they look to extend Cueto, that is two, but that would be a big increase to their budget, so filling out the rest of their rotation with cost controlled pitchers seems to make a ton of sense for them. Cingrani hasn't quite performed as expected, but they do have Robert Stephenson on the cusp, so lets assume that one of them takes over a third spot.
I could see a deal of (their choice on all the groupings) of Cespedes or Craig to play left field; two from the group of Ranaudo, Barnes, Escobar, Workman; one of Coyle or Rijo (Phillips has three years left on his deal); and one of Marrero, Shaw or Travis making a ton of sense for both teams (if you look at their system, they have some good pitching and outfield prospects, but not much on the infield).
For the Red Sox, they take the money that would have been utilized to sign one 30+ FA starter this off-season (call it $22M) and allocate it instead to matching 5yr / $55m extensions for two pitchers who will both be 27 heading into next season (and they each get to go back on the market before their age 32 season for another pay day).
Our rotation next season and going forward is Latos, Leake, Kelly, De La Rosa and Buchholz. Also leaves Ranaudo*, Owens, Johnson and Rodriguez waiting in the wings.
Line up becomes:
Betts - RF; Bogaerts - SS; Ortiz - DH; Napoli - 1b; Pedroia - 2b; Free Agent - 3b; Castillo - CF; Nava / Craig* - LF; Vazquez - C. In this I'm assuming that Cincinnati would opt for Cespedes, Barnes, Escobar, Rijo and Travis because that's what I'd take.