BALTIMORE, MD - MAY 21: Pitcher David Robertson #30 of the New York Yankees throws to a Baltimore Orioles batter during the eighth inning of the Yankees 3-2 loss at Oriole Park at Camden Yards on May 21, 2013 in Baltimore, Maryland. (Photo by Rob Carr/Getty Images)

Toronto Blue Jays' Edwin Encarnacion hits a solo home run off of New York Yankees relief pitcher David Robertson in the eighth inning of a baseball game at Yankee Stadium on Saturday, May 18, 2013 in New York. The Yankees won 7-2. (AP Photo/Kathy Kmonicek)

New York Yankees pitcher David Robertson, right, shakes hands with catcher Austin Romine after the Yankees defeated the Toronto Blue Jays, 5-0, in a baseball game on Friday, May 17, 2013, at Yankee Stadium in New York. (AP Photo/Bill Kostroun)

Houston Astros' Chris Carter watches his eighth-inning, two-run home run off New York Yankees relief pitcher David Robertson in a baseball game at Yankee Stadium in New York, Tuesday, April 30, 2013. (AP Photo/Kathy Willens)

Houston Astros designated hitter Carlos Pena (12) greets Chris Carter (23) at the plate after scoring on Carter's eighth-inning, two-run home run off New York Yankees relief pitcher David Robertson in a baseball game at Yankee Stadium in New York, Tuesday, April 30, 2013. (AP Photo/Kathy Willens)

Houston Astros' Chris Carter watches his eighth-inning, two-run home run off New York Yankees relief pitcher David Robertson in a baseball game at Yankee Stadium in New York, Tuesday, April 30, 2013. (AP Photo/Kathy Willens)

TORONTO, CANADA - APRIL 20: David Robertson #30 of the New York Yankees delivers a pitch in the eighth inning during MLB game action against the Toronto Blue Jays April 20, 2013 at Rogers Centre in Toronto, Ontario, Canada. (Photo by Brad White/Getty Images)

NEW YORK, NY - APRIL 13: David Robertson #30 of the New York Yankees delivers a pitch in the ninth inning against the Baltimore Orioles on April 13, 2013 at Yankee Stadium in the Bronx borough of New York City.The Baltimore Orioles defeated the New York Yankees 5-3. (Photo by Elsa/Getty Images)

NEW YORK, NY - APRIL 13: David Robertson #30 of the New York Yankees delivers a pitch in the ninth inning against the Baltimore Orioles on April 13, 2013 at Yankee Stadium in the Bronx borough of New York City.The Baltimore Orioles defeated the New York Yankees 5-3. (Photo by Elsa/Getty Images)

DETROIT, MI - APRIL 07: David Robertson #30 of the New York Yankees throws an eighth inning pitch while playing the Detroit Tigers at Comerica Park on April 7, 2013 in Detroit, Michigan. New York won the game 7-0. (Photo by Gregory Shamus/Getty Images)

TAMPA, FL - MARCH 20: Pitcher David Robertson #30 of the New York Yankees pitches against the Boston Red Sox during a Grapefruit League Spring Training Game at George M. Steinbrenner Field on March 20, 2013 in Tampa, Florida. (Photo by J. Meric/Getty Images)

TAMPA, FL - FEBRUARY 20: David Robertson #30 of the New York Yankees poses for a portrait on February 20, 2013 at George Steinbrenner Stadium in Tampa, Florida. (Photo by Elsa/Getty Images)