The Yankees are surging, back to .500 and could be on the path to a summer-long postseason race. While the team is certainly capable of competing, imagine what the 2016 roster would look like with another ace-level starting pitcher.
While Masahiro Tanaka (3.24 ERA) has been excellent and the staff has looked better lately, Yankees starters own 4.60 ERA this season. That's good for 22nd in baseball, and only three American League clubs are worse.
When the trade deadline nears, the Yankees—if they don't sell off big parts like Brian McCann and Carlos Beltran—could look to upgrade the rotation.