Outfielder Jackie Bradley, Jr., will be called up Wednesday for the start of a two-game series in Philadelphia and right-hander Alex Wilson will be optioned back to Triple-A Pawtucket, according to a source.

Bradley, who had never played above Double-A before this season, started the season with the major league team before getting sent back to Pawtucket April 19.

Bradley, who was on the disabled list with right biceps tendinitis form May 4-17, went 1-for-4 with a double and a walk at Indianapolis Tuesday night and is now hitting .354 with two home runs, and nine RBI, 15 runs scored and is riding an 12-game hitting streak. He struggled at the plate in his first stint with the Sox, batting .097, going 3-for-31 in 12 games.

Manager John Farrell said before Tuesday’s game, a 3-1 loss to the Phillies, he is impressed with the reports he’s been getting on Bradley.

“Very good,” Farrell said of the reports. “Once he got past the shoulder tendonitis an got back on the field, much like we saw in spring training with his defense, two good plays last night, doubled off a guy with a throw, threw out another runner, home run a double last night. He’s been swinging the bat very well.”

Bradley has played all three outfield positions this season, with the Sox wanting him to get additional outfield experience – similar to the moves they made with shortstop Jose Iglesias, who played third base for the first time in his career last week before being called up to take the place of third baseman Will Middlebrooks when he went on the DL.

Farrell said before the game, if Bradley were to get called up, the need for him to play every day would not be as great as it was at the beginning of the season, Farrell said.

“No, if he were here, he would come back as an extra outfielder,” he said.

Wilson, who last pitched Sunday, a scoreless seventh inning against the Indians, is 1-0 with a 2.50 ERA in 16 appearances, spanning 18 innings. He earned his first major league win on May 17 at Minnesota, throwing just two pitches in his outing.