The New York Yankees are aggressively trying to upgrade their starting rotation ahead of the July 31 non-waiver trade deadline.

New York has seen four-fifths of its Opening Day rotation end up on the disabled list.

"I have to reinforce our pitching, in my opinion," Brian Cashman said. "I have things that I feel I have to try to do, that I'm trying to do, but it is easier said than done."

The Yankees, 47-47 on the season, start the second half five games behind the Baltimore Orioles in the American League East and 3.5 back of the Seattle Mariners for the final wild card.