Pittsburgh ? No. 2 draft pick Pedro Alvarez refused to sign his contract with the Pittsburgh Pirates, and the players’ association filed a grievance Wednesday claiming the Aug. 15 deadline was unilaterally extended by MLB without the union’s permission.

Red Sox acquire Kotsay

Atlanta – Center fielder Mark Kotsay was acquired by the Red Sox from the Atlanta Braves on Wednesday, only one day after Boston put J.D. Drew on the 15-day disabled list because of a lower-back strain. The 32-year-old Kotsay hit .289 with six home runs and 37 runs batted in 88 games with the Braves.

The Braves acquired minor-league outfielder Luis Sumoza in the deal. The 20-year-old hit .301 in 51 games for Class A Lowell of the New York-Penn League this season.