Not sure if serious or not, but these guys at all 26/27 and have already played in big leagues. None of them would be getting rushed at this point, and the Sox need to figure out what they have with each of Fletcher, Deloach and Colas this season. Even if you want to assume the Sox are done with Colas (which him remaining on the 40 man would potentially suggest otherwise), it still applies to the other two.
Even if we somehow get A+ version of Tauchman from April-June, you're getting (at best) at backend top 30 flyer or a AAAA type. Just play the fringe guys and see what we have. It doesn't make any sense within the context of the whole roster and where things stand.
That being said, Tauchman is a big leaguer, is probably better than all three of those guys and I can't imagine costs more than $3-4M. So its not like this is some brutal move, it just doesn't make a lot of sense considering the circumstances.