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Holliday, Montgomery activated by Yankees

Newly acquired Cooper brought up, Pineda lands on DL with elbow injury

Matt Holliday is congratulated by teammates following a home run. (AP)

The New York Yankees made a series of roster moves prior to Friday's second half-opener in Boston, announcing that they have done the following:

-Reinstated designated hitter Matt Holliday (illness) from the 10-day disabled list

-Recalled LHP Jordan Montgomery from Triple-A Scranton/Wilkes-Barre

-Signed first baseman Garrett Cooper to a major-league deal and selected him to the 25-man roster

-Placed RHP Michael Pineda on the 10-day disabled list (retroactive to July 11) with a right UCL injury

-Optioned infielder/outfielder Rob Refsnyder Triple-A Scranton/Wilkes-Barre

Holliday, who has hit .262 with 15 home runs and 47 RBI in 68 games with the Yankees this season, was placed on the disabled list on June 28 (retroactive to June 25) with what the team called a viral infection, possibly thought to be a lingering effect of an allergic reaction he suffered in Oakland two weeks earlier.

The 37-year-old, however, told reporters in New York last Wednesday that he had tested positive for the Epstein-Barr virus, better known as the cause for infectious mononucleosis; he took batting practice last Friday at Yankee Stadium before leaving for Scranton, where he went 3-for-8 with an RBI in two rehab games with the RailRiders last weekend.

Montgomery, who will start Friday night's game, is 6-4 with a 3.65 ERA in 16 starts this season. He had been optioned to Triple-A last Saturday following his final start of the first half, and is eligible to return prior to the minimum 10 days because of Pineda's injury.

Cooper, 26, was acquired from the Brewers on Thursday in exchange for LHP Tyler Webb. He hit a Pacific Coast League-leading .366 with a 1.080 OPS, 17 home runs, 29 doubles, and 82 RBI in 75 games with Triple-A Colorado Springs, and was scheduled to report to SWB before a change in plans on Friday.

The Yankees had an open spot on both the 40-man and 25-man rosters after the Webb deal on Wednesday, so they did not need to make a move on either front to accommodate Cooper.

Pineda, who is 8-4 with a 4.39 ERA in 17 starts this season, was diagnosed with a partial tear of his right ulnar collateral ligament after complaining of discomfort following his start last Wednesday. According to general manager Brian Cashman, Tommy John surgery is likely; Pineda will consult a second opinion, but he is likely to miss the remainder of the season either way.

The 6-foot-7 righty is scheduled to become a free agent this winter, and if the injury brings to an end his six-year tenure in pinstripes, he finishes with a 31-31 record and 4.16 ERA in 117 major-league starts.

Refsnyder has hit .135 in 20 games with the Yankees this season, but has not played since July 2. In 34 games with the RailRiders, he has hit .309 with one home run and 10 RBI.