What a headache!

Pain still keeping Ellsbury tethered to bench

Jacoby Ellsbury missed a 12th straight game on Wednesday night due to the concussion he suffered when he slammed into the center-field wall at Yankee Stadium on May 24, and he acknowledged he still is suffering headaches from the blow — meaning there’s no timetable for his return.

“Some days are a little better than others,” Ellsbury said before the Yankees beat the Red Sox, 8-0.

But no day has been good enough for him to even resume baseball activities.

Instead, Ellsbury did some light work on a stationary bike again on Wednesday, since exerting too much energy causes the symptoms to return.

“Until we get completely rid of headaches, he can’t do much,’’ manager Joe Girardi said. “But it seems like when he starts activity, they come back.”

That makes any potential return to the lineup “really hard to predict,” according to the manager.

The Yankees have learned that the hard way, since Ellsbury had progressed enough by last week in Baltimore after initially suffering the injury that he was able to do some work on the field. He also had planned to take batting practice last weekend in Toronto.

Instead, the headaches came back and Ellsbury hasn’t considered BP again and he hasn’t even thought about whether he’ll need a minor league rehab stint before he can return. ➤ The struggling Gary Sanchez was dropped from second to sixth in the lineup. Girardi painted the move as more about moving Aaron Hicks up in the order, but there’s no denying that Sanchez’s first full season in the majors has been disappointing. The switchhitting Hicks had a nine-game hitting streak snapped after going 0-for-4, but he still leads the Yankees with a .433 on-base percentage,

“We decided it’s probably best not to ignore what Hicks is doing and to put Sanchez in a more traditional RBI spot to see if it gets him going,” Girardi said.

The move paid off when Sanchez delivered an RBI single in the fourth inning.

The catcher is still in a 9-for-51 slide with 17 strikeouts, four walks, two homers and five RBIs since May 21.

“Wherever I hit, second, ninth, anywhere, wherever they want me to hit I’ll be ready to hit,’’ Sanchez said through an interpreter.

➤ Greg Bird is expected to continue his rehab form a bruised right ankle with Triple-A Scranton/Wilkes-Barre on Thursday.

➤ Jerry Remy, the former Red Sox second baseman who now is a broadcaster for the team on NESN, apologized for saying Tuesday he didn’t think translators should be able to go to the mound during visits when non-English speaking pitchers are in the game.

“I don’t think that should be legal,” Remy said on NESN during a mound visit when Masahiro

Tanaka was pitching. “I really don’t. Learn baseball language. You know, learn. It’s pretty simple.”

He said on Twitter on Wednesday: “I sincerely apologize to those who were offended by my comments during the telecast last night” and apologized again on air before the game. Tanaka defended the practice. “I think little nuances could get lost in the process of trying to communicate, especially when you don’t know the language,” Tanaka said through an interpreter.