Frazier starts on road back

KANSAS CITY, Mo. — Clint Frazier began a rehab assignment with Low-A Tampa on Tuesday as he tries to come back from the mystery ailment that has sidelined him since he left a game on June 30.

Manager Aaron Boone said the Yankees have been unable to determine exactly what has caused Frazier’s issues, testing for concussion-related symptoms, as well as vision issues.

“I know he’s in a pretty good place,’’ Boone said before Frazier went 2-for-4 with a double and two strikeouts for Tampa.

But when asked if there is even a spot for Frazier on the roster now that the Yankees have added Joey Gallo, Boone didn’t say yes.

“We’ll see,’’ Boone said. “That’s a ways off to even think about. … I’m not gonna speculate. Our roster is as fluid as it could possibly be. Every time I’m making a plan for the next few days, something gets turned upside down.”

He did note, “We know what Clint is capable [of] and his talent. He needs to get games under his belt.”

➤ Gallo went hitless and struck out three times in the Yankees’ 8-4 loss to the Royals on Tuesday as his struggles continue. Since a threehit game on Aug. 5, Gallo is 2-for-18 with 11 strikeouts . .... The Yankees announced that Lucas Luetge will start Wednesday’s game.

➤ Anthony Rizzo, one of four Yankees on the COVID-19 IL, is “doing a little better,” according to Boone.

“He’s feeling OK,’’ Boone said of Rizzo, a cancer survivor who said publicly in June that he hadn’t been vaccinated. “He has some symptoms.”

Gary Sanchez had symptoms for “several days,’’ according to Boone, but “felt really good [Tuesday.] ... He turned a corner the last couple days.”

As for Gerrit Cole and Jordan Montgomery — also out with COVID-19 — Boone said they could rejoin the team on the road trip this week and possibly will throw bullpen sessions this weekend, when the Yankees play the White Sox in Chicago.