Total IP by Mariano Rivera, Boone Logan, and Joba Chamberlain in 2013: 145.0 IP
Total IP added this offseason to replace them: 0
The bullpen was an area of need this offseason before yesterday. The Yankees were going to be without the greatest closer in baseball history for the first time in almost 20 years and they still hadn't committed to his internal heir apparent as the actual heir to his throne. After yesterday, it's become a much bigger area of need. With Logan going to Colorado and Joba to Detroit, the Yankees are missing almost a third of their total bullpen work from this season, 30.36% to be exact, and they haven't made any progress on replacing any of it.
They have internal options, but the plan was always to sign at least 1 veteran arm to pick up some of that 145-inning slack. With some big names already off the board and a few more in serious talks with other teams, it might be time to start ramping up efforts to replace those innings.