Aaron Boone said Giancarlo Stanton, who reported for spring training Sunday with the rest of the position players, enters camp dealing with the equivalent of "tennis elbow" in both elbows.

The New York Yankees are already dealing with an injury to one of their top power hitters. Giancarlo Stanton has soreness in both elbows and hasn't swung a bat in three to four weeks, he revealed Monday morning.

The pain in both of Stanton's arms is "probably something that's chronic," according to Yankees manager Aaron Boone.

Stanton said he dealt with the condition, which is in both elbows, most of last season — including in October, when he was by far the Yankees’ best offensive performer as they reached the World Series. He said he has not swung a bat in the last “three to four weeks.” It is not clear when he will begin doing so.

Asked if his elbows got worse during the offseason, Stanton replied, “The pain was very high in general.” While he declined to say exactly when or how the issues first flared up, the two elbows began hurting about two months apart.