Theo had a press conference a few minutes ago.  He said the Sox came close on a number of deals.  

The FO has a long-term plan and it would have been short-sighted to sacrifice that plan for what Theo called an "incremental improvement" over the final two months of the season.  Ultimately, none of the deals were worth it.  The Sox didn't want to get "emotional" and "reactive" because of what other teams were doing.  

There's always the waiver wire.  He wants to keep an approach the team has followed the last three years.  The FO wants to build a team that wins 95-100 games every year, not just one year.