Yankees prospect Dominguez (left side) off to IL

BOSTON — New York Yankees top prospect Jasson Dominguez was placed on Triple-A Scranton/Wilkes-Barre’s injured list Sunday with a left side injury.

Yankees manager Aaron Boone said Dominguez suffered the injury on an “awkward” checked swing in his third plate appearance Saturday. He finished the at-bat, striking out looking, and played another inning in center field before he was removed from the game. He went 1 for 3 with a stolen base and two strikeouts.

“He’s getting testing today,” Boone said before the Yankees faced the Boston Red Sox on Sunday. “But it’s enough to put him on the IL right away at least. I’m sure we’ll have an idea — hopefully have an idea — with what exactly we got by tonight or (Monday).”

One of the more heralded prospects in recent years, Dominguez, nicknamed “The Martian,” made his major-league debut last September before his 21st birthday. He played in eight games for the Yankees, batting .258 with four home runs, before tests revealed a torn ulnar collateral ligament in his right elbow. He returned to the field after surgery in mid-May on rehab assignment.

The rehab assignment ended Wednesday when the Yankees, who have a surplus of outfielders, activated Dominguez from the 60-day injured list and optioned him to Scranton/Wilkes-Barre. Dominguez slashed .389/.405/.609 in nine games in triple-A before the injury.